Fishway block - List of Manufacturers, Suppliers, Companies and Products | IPROS

Fishway block Product List

1～25 item / All 25 items

Displayed results
Fishway Block Spiral Fishway

Fishway Block Spiral Fishway

Fishway Block Spiral Fishway

This is a fish passage constructed in a spiral shape by stacking blocks that divide the circumference to match the drop height of dams and weirs. This method is implemented with permission from Obayashi Corporation and Obayashi Road Corporation. 【Features】 ○ The ice harbor type and full overflow type can accommodate a wide range of fish species. ○ The circular and spiral shape minimizes the occupied area, allowing for the installation of fish passages up to approximately 10 meters in height. ○ The assembly type using common blocks offers excellent workability. ○ The higher the installation height, the lower the cost per height compared to site-cast stair-type fish passages. *Please contact us for more details.

  • Spiral staircase
  • Tunnel construction
  • Airport facilities
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction in Shirakawa, Kumamoto Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction in Shirakawa, Kumamoto Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Heisei 14 Year Shirakawa Tsukui Te Dam Fishway Improvement Project ■ Construction Location: Shirakawa (Jinnai, Ozu Town, Kikuchi District, Kumamoto Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Thanks to its unique structure that can adapt to changes in water levels, it allows water to flow from the collection ditch beneath the floor during low water conditions. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Ibi River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Ibi River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of conventional fishways.

In conventional fishways, there have been challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: Heisei 16 Fiscal Year Ochiai Riverbank Disaster Recovery Work ■Construction Location: Ibi River (Ochiai area, Ibi Town, Ibi County, Gifu Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■Fish can ascend from any direction due to its 180-degree accessibility, preventing fish stagnation. ■It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■Thanks to its unique design that can adapt to changes in water levels, it allows water to flow from the collection ditch under the floor during low water periods. ■By realizing concrete secondary products as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for fishways. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction at the Kanase River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction at the Kanase River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there are challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations of the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Eco 3-2 No. 2, Prefectural Eco River, Kase River, etc. ■ Construction Location: Kase River (Yabuki Town, Ibi County, Gifu Prefecture, near Tanigumi Nagase) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■ It features a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Kanase River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Kanase River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of conventional fishways.

In traditional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: Prefectural Eco-River Kanse River and others ■Construction Location: Kanse River (Tachikubo Kiso-ya, Ibi-gun, Ibi-cho, Gifu Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Fishway"】 ■Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■Thanks to its unique structure that can adapt to changes in water levels, it allows water to flow from the collection ditch below the floor during low water conditions. ■By realizing the concrete secondary productization as terraced fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction at the Kanase River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction at the Kanase River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of conventional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Daiwa Repair No. 5 Prefectural River Maintenance and Repair Work ■ Location: Kanase River (Tani-gumi Nagase, Ibi-gun Ibigawa Town) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch under the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simple construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there are challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as creating drawings and quantity calculations), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: River Maintenance and Repair No. 10 ■ Construction Location: Asukagawa River (Tani-gumi, Ibi-gun, Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from stagnating. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Thanks to its unique structure, it can respond to changes in water levels, allowing water to flow from the collection ditch below the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and easy construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Rice Field Fishway": Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Rice Field Fishway": Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there have been challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: River Maintenance and Repair No. 9 ■ Construction Location: Asukagawa River (Tani-gumi, Ibi-cho, Ibi-gun, Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from lingering. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Thanks to its unique structure that can adapt to changes in water levels, it allows water to flow from the collection channel beneath the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Rice Field Fishway": Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Rice Field Fishway": Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In traditional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: No. 1 Public Comprehensive River Basin Disaster Prevention (River Environment Project) ■ Construction Location: Asukagawa (Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can respond to changes in water levels, allowing water to flow from the collection ditch below the floor during low water periods. ■ By realizing concrete secondary products as terraced rice field fishway blocks, we achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Rice Field Fishway" case: Fishway design/construction on the Iruma River in Saitama Prefecture.

Introduction of the "Terraced Rice Field Fishway" case: Fishway design/construction on the Iruma River in Saitama Prefecture.

[Case Study] Improving upstream migration efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there were challenges such as difficulties in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: Improvement of Fish Migration Environment at Terayama Weir and Asama Weir, No. 201 Iruma River ■Construction Location: Iruma River (Saitama Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■Fish can migrate from any direction due to the 180-degree design, preventing fish stagnation. ■It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■Thanks to its unique structure, it can respond to changes in water levels, allowing water to flow from the collection ditch below the floor during low water periods. ■By realizing the concrete secondary productization as terraced rice field fishway blocks, it achieves stable quality and simple construction as a fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the challenges of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Daiwa Fish 1, River Repair No. 3, Prefectural River Fishway Function Restoration 　　　　　River Maintenance and Repair (Safety and Security Measures for Living) Project ■ Construction Location: Asukagawa (Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction at 180 degrees, preventing fish from stagnating. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can respond to changes in water levels, allowing water to flow from the collection ditch under the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we achieved stable quality and simple construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Solving the challenges of traditional fish passes! "Terraced Fish Pass" ★ Free Design & Construction Case Collection ★

Solving the challenges of traditional fish passes! "Terraced Fish Pass" ★ Free Design & Construction Case Collection ★

There are papers available on the retroactive effect and performance! We also offer design proposals and drawing creation! We solve the issues of traditional fish passages, such as a 180-degree opening and maintenance-free features!

The "Terraced Rice Field Fishway" by Yamachin Group is a fan-shaped fishway that allows fish to ascend from any angle, 180 degrees. Its unique "slit pool wall structure" using pebbles ensures that the pool is shallow and does not accumulate sediment, eliminating the need for maintenance! Even with low river water levels, it secures an ascent route, and construction is simplified by just laying the terraced fishway blocks, significantly reducing the burden on the site. I conducted research on fishways at the Graduate School of Gifu University and obtained a doctorate. There is also a wealth of academic data regarding the terraced fishway, making it a highly reliable product. 【Key Points for Choosing This Product】 ■ Jointly developed patented fishway with the Ministry of Land, Infrastructure, Transport and Tourism and Yamachin Group! ■ Solves the issues of traditional fishways with a 180-degree opening! ■ Promotes fish ascent with a unique slit pool wall made of pebbles! ■ Maintenance-free structure that prevents sediment accumulation! ■ Verification of ascent by bottom-dwelling fish and aquatic insects confirmed after installation! ■ Made into concrete secondary products, ensuring quality while simplifying construction. ★ A collection of design and construction examples of the "Terraced Rice Field Fishway" from various locations across the country can be viewed by downloading the catalog below. Additionally, for those interested, we also have a paper verifying the ascent effect available.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Terraced fishway [Upstream migration rate is about three times! Prevents fish stagnation!]

Terraced fishway [Upstream migration rate is about three times! Prevents fish stagnation!]

A terraced fishway that achieves a threefold upstream migration rate! Fish can ascend from any direction at 180°, preventing their stagnation!

The terraced fishway has a 180-degree opening that is not found in traditional fishways, allowing fish to ascend from anywhere within the fishway. In our own ascent survey, approximately 70 percent of the fish ascended from both sides of the fishway, and it has been confirmed that fish can ascend without lingering. 【Features】 ■ Fish can ascend from anywhere with a 180-degree opening, preventing fish from lingering. ■ It has a maintenance-free structure that prevents sediment accumulation. ■ During low water periods, water is drawn from the collection ditch beneath the floor. ■ It achieves stable quality and simple construction as a fishway. *For more details, please request materials or view the PDF data available for download.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In traditional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape made from natural stones. We also provide explanations of the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: 1999 Neogawa Karakuri River Bank Protection Work ■ Location: Neogawa River (Ono Town, Ibi County, Gifu Prefecture, vacant land) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simple construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Makita River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Makita River in Gifu Prefecture.

[Case Study] Improving upstream migration efficiency with a unique design! The terraced fishway solves the challenges of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to the upstream route and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations of the terraced rice field fishway, consultations on fishway design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Heisei 12 Year Makita River No. 13 Bed Stabilization Terraced Rice Field Fishway Installation Project ■ Construction Location: Makita River (Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from lingering. ■ It features a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch directly beneath the bed stabilization during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Rice Field Fishway": Fishway design/construction in Shirakawa, Kumamoto Prefecture.

Introduction of the "Terraced Rice Field Fishway": Fishway design/construction in Shirakawa, Kumamoto Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there are challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which has a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: FY 2003 Shirakawa Oide Tamakawa Fishway Improvement Project ■Construction Location: Shirakawa (Shimo-mori, Ozu Town, Kikuchi District, Kumamoto Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■Fish can ascend from any direction due to the 180-degree design, preventing fish stagnation. ■It features a maintenance-free structure that prevents sediment accumulation inside the fishway. ■Thanks to its unique structure that can adapt to changes in water level, it allows water to flow from the collection ditch beneath the floor during low water conditions. ■By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Rice Field Fishway" case: Fishway design/construction at Oyanagigawa in Yamanashi Prefecture.

Introduction of the "Terraced Rice Field Fishway" case: Fishway design/construction at Oyanagigawa in Yamanashi Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In traditional fishways, there were challenges such as difficulties in guiding fish to their upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamataru's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: Oyanagigawa River Construction ■Construction Location: Oyanagigawa (Yanagawacho, Kofu City, Yamanashi Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■Fish can ascend from any direction due to its 180-degree design, preventing fish from stagnating. ■It features a maintenance-free structure that prevents sediment accumulation inside the fishway. ■Thanks to its unique design that accommodates changes in water levels, it allows water to flow from the collection ditch beneath the floor during low water periods. ■By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Dai River Repair No. 5 Prefectural River Maintenance and Repair Work ■ Location: Asukagawa River (Tachikubo Kiso-ya, Ibi-gun Ibigawa Town) ■ Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from lingering. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Thanks to its unique structure that can adapt to changes in water levels, it allows water to flow from the collection ditch below the floor during low water conditions. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case study: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case study: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In traditional fishways, there were challenges such as difficulty in guiding fish to upstream routes and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Studies】 ■ Project Name: Prefectural Eco-River Project, Prefectural River Maintenance and Repair Work ■ Construction Location: Asukagawa River (Tachikubo Kiso-ya, Ibi-gun, Ibigawa Town) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from gathering. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the floor during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we achieved stable quality and simple construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

[Case Study] Improving upstream migration efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fish passages, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fish passage, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fish Passage," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fish passage, consultations on fish passage design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■Project Name: 2008 Neogawa Bed Stabilization Improvement Project ■Location: Neogawa River (Kamikakichi, Ono Town, Ibi County, Gifu Prefecture, and others) ■Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fish Passage"】 ■Fish can ascend from any direction due to its 180-degree accessibility, preventing fish stagnation. ■It has a maintenance-free structure that prevents sediment accumulation inside the fish passage. ■Thanks to its unique structure that can adapt to changes in water levels, it allows water to flow from the collection ditch directly beneath the bed stabilization during low water periods. ■By realizing the concrete secondary productization as terraced rice field fish passage blocks, we have achieved stable quality and simplified construction for the fish passage. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Neo River in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced rice field fishway, consultations on fishway design (such as drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Neogawa No. 4 Bed Stabilization Improvement Project ■ Location: Neogawa (Ishigami, Motosu City, Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from stagnating. ■ It features a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch directly beneath the bed stabilization during low water periods. ■ By realizing the concrete secondary productization as terraced rice field fishway blocks, we have achieved stable quality and simplified construction for fishways. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design and construction at the River Environment Park in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design and construction at the River Environment Park in Gifu Prefecture.

[Case Study] Improving upstream efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there have been challenges such as difficulty in guiding fish to the upstream route and the accumulation of sediment within the fishway, which reduces its functionality. These issues are addressed by Yamatazumi's "Terraced Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced fishway, consultations on fishway design (such as creating drawings and quantity calculation sheets), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Heisei 21 National Park Sanpagawa District Landscape Facility Improvement Project ■ Construction Location: River Environment Paradise (Near the west parking lot of Kawashima, Kakamigahara City, Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Points for Choosing the "Terraced Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from congregating. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Thanks to its unique structure that can adapt to changes in water level, it allows water to flow from the collection ditch below the floor during low water conditions. ■ By realizing the concrete secondary productization as terraced fishway blocks, it achieves stable quality and simple construction as a fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Parking lot facility construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

Introduction of the "Terraced Fishway" case: Fishway design/construction on the Asukagawa River in Gifu Prefecture.

[Case Study] Improving upstream migration efficiency with a unique design! The terraced fishway solves the issues of traditional fishways.

In conventional fishways, there were challenges such as difficulty in guiding fish to upstream routes and sediment accumulation within the fishway, which reduces its functionality. These issues are resolved by Yamataru's "Terraced Rice Field Fishway," which features a unique shape utilizing natural stones. We also provide explanations of the terraced rice field fishway, consultations on fishway design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Recovery Project for River Fishway Function No. 2, Ikawa River ■ Location: Asukagawa (Gifu Prefecture) ■ Construction Photos: Please see the construction photos on this page. 【Reasons to Choose the "Terraced Rice Field Fishway"】 ■ Fish can ascend from any direction due to the 180-degree design, preventing fish from lingering. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fishway. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the floor during low water periods. ■ By realizing concrete secondary products as terraced rice field fishway blocks, we achieved stable quality and simplified construction for the fishway. *For more details, please contact us or download the catalog to view.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Fish Path SPIRAL

Fish Path SPIRAL

The method of stacking fishway blocks in an oval shape allows for a significant reduction in the site area.

■The method of stacking fishway blocks in an oval shape significantly reduces the site area. ■The product shapes used for the curved and straight sections are standardized, which enhances workability. ■By creating a track shape with straight sections between the semicircular parts, the flow conditions in the pool are adjusted to facilitate fish ascending. ■The slope of the fishway has the semicircular return section at level and the ascending straight section at a gentle slope of 1/10, improving the ascent efficiency compared to a circular shape. ■The partition wall adopts an ice harbor method that accommodates small fish species. ■By rounding the shape of the overflow section of the partition wall, it creates a submerged flow that is easier for fish to ascend. ■Overflowing at the fishway outlet section allows for adjustment of the fishway flow rate. ■Light windows are installed to ensure adequate illumination.

  • Secondary steel products
  • Foundation construction
  • Other civil engineering works
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration
Terraced Fishway: Jointly Developed Patent Fishway with the Chubu Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism

Terraced Fishway: Jointly Developed Patent Fishway with the Chubu Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism

The unique shape is effective for upstream migration! The terraced fishway has solved the issues faced by conventional fishways!

In traditional fish passes, there were challenges such as difficulties in guiding fish to upstream routes and the accumulation of sediment within the fish pass, which reduces its functionality. These issues are addressed by the unique terraced fish pass that utilizes natural stones. We also provide explanations about the terraced fish pass, consultations on fish pass design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Features】 ■ Fish can ascend from any direction thanks to the 180-degree design, preventing fish from lingering. ■ It has a maintenance-free structure that prevents sediment accumulation inside the fish pass. ■ The unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the solid floor during low water conditions. ■ By realizing the concrete secondary productization as terraced fish pass blocks, we have achieved stable quality and simple construction for the fish pass. ■ By installing it as an auxiliary fish pass next to existing protruding fish passes, fish ascension can be made more effective. ■ Research has confirmed that not only swimming fish like sweetfish and amago but also bottom-dwelling fish like red crucian carp and gobies, as well as aquatic insects, utilize it. *For more details, please request materials or view the PDF data from the download section.

  • Airport facilities
  • River construction
  • Fishway block

Added to bookmarks

Bookmarks list

Bookmark has been removed

Bookmarks list

You can't add any more bookmarks

By registering as a member, you can increase the number of bookmarks you can save and organize them with labels.

Free membership registration

Related Categories of Fishway block

COPYRIGHT © 2001-2026 IPROS CORPORATION ALL RIGHTS RESERVED.