山辰組 List of Products and Services

In riverbank vegetation removal work, the incineration of cut grass may be carried out. The conventional incineration method generates a large amount of smoke due to combustion temperatures of 400 to 500 degrees, requiring considerable effort to consider the surrounding area. Additionally, there have been cases where incineration work could not proceed as scheduled due to rain and other factors. This device achieves combustion temperatures exceeding 900 degrees with a dedicated frame and compressor, significantly reducing smoke emissions. It can mitigate the impact on the surrounding environment. Furthermore, it enables an increase in the incineration volume by 2.6 times compared to conventional incineration methods. By improving the efficiency and productivity of the incineration work, which is the final stage of the project, the stress on the construction personnel is alleviated. Moreover, while the conventional method sometimes resulted in delays in incineration work due to bad weather such as rain, this device can reduce the number of days required for incineration, greatly contributing to the completion of incineration work within the project timeline.

• Waste treatment facility

The "Scoop-Up System" is a patented device and method for collecting floating debris from the water surface. The collection basket is attached to a rough terrain crane to retrieve floating objects. Compared to traditional work using backhoes, the efficiency of collecting pumice and other materials is significantly improved. Additionally, the collection basket can be assembled from materials that are available nationwide, and no special skills are required for the rough terrain crane operator. 【Features】 ■ Rapid collection of large amounts of pumice is possible ■ Contributes to solving the issue of pumice, which has become a social problem ■ Collection efficiency of pumice and other materials is significantly improved compared to traditional methods ■ The collection basket can be assembled from materials that are available nationwide ■ No special skills are required for the rough terrain crane operator *For more details, please refer to the PDF document or feel free to contact us.

• Water treatment technology and systems

The Yamata Siphon installed in Iga City, Mie Prefecture has been operating smoothly since its installation. Therefore, we calculated how much cost reduction has been achieved compared to the conventional water replacement method. The fuel costs, underwater pump, and generator rental required for the conventional method amount to about 600,000 yen per month. Since the Yamata Siphon does not use fuel, underwater pumps, or generators, it can significantly reduce those costs. Even after deducting the lease fee for this equipment, there is still a cost cut of about 500,000 yen!

• Agricultural civil engineering works
• Drainage and water removal
• Drainage material

At the pond in Kyoto, renovation work was carried out, and due to the decrease in water level, we received inquiries about the hybrid Yamata siphon. Considering the local conditions, we proposed a φ100mm siphon drainage system. Through siphon drainage, we were able to lower the water level of the pond, which is 50m wide and 50m deep, by approximately 1m per day. Transportation and installation were carried out using a small backhoe and six workers. With a piping extension of 80m and a height difference of 10m between the pond's water level and the discharge outlet, we achieved drainage of 1.7m³ per minute with zero fuel consumption through siphon drainage.

• Agricultural civil engineering works
• Drainage and water removal
• Drainage material

A company that was considering lowering the water level in a reservoir in Iga City, Mie Prefecture, contacted us regarding the hybrid Yamata siphon. Considering the local conditions, we installed a φ100mm siphon drainage system. Through siphon drainage, we were able to lower the water level of the reservoir, which is 100m wide and 100m deep, by 20cm per day. The site was inaccessible to large machinery, so transportation and installation were carried out using a small all-terrain transport vehicle and seven workers. Additionally, due to the difficulty of transporting a 4-inch submersible pump and a three-phase generator for starting the siphon, we used three 2-inch submersible pumps and a portable generator that could be carried by hand to initiate the siphon. With a 100m extension of the piping and a height difference of 10m between the water level in the reservoir and the discharge outlet, we achieved a drainage rate of 2m³ per minute with zero fuel consumption through siphon drainage. This drainage rate of 2m³ per minute was comparable to that of a φ150mm submersible pump powered by electricity.

• Agricultural civil engineering works
• Drainage and water removal
• Drainage material

This is a device that easily initiates drainage due to a decrease in water level in places with elevation differences, such as agricultural ponds, using a suction hose and dedicated components. Because it operates on the principle of siphoning, fuel costs are nearly zero. This allows for significant cost reductions in fuel expenses, and it also reduces the hassle of refueling. The device with a diameter of 100mm can be transported manually and can be installed in locations where heavy machinery cannot access. The greater the elevation difference, the more drainage capacity increases; in practice, the 100mm device has recorded drainage rates of over 2m³ per minute. This is roughly equivalent to the drainage volume achieved using conventional 150mm submersible pumps powered by electricity.

• Drainage material
• Drainage and water removal
• Agricultural civil engineering works

The "Hybrid Yamatachi Siphon Drainage Device" is a system that allows for drainage work at construction sites with minimal fuel costs, based on the principle of "priming." It is a system that utilizes the "elevation difference" found in natural dams and sediment control construction sites. In the case of underwater pump methods, a generator and a large amount of fuel are required to operate the pump 24 hours a day. However, with this product, the pump is only used at the initial stage! Once switched to siphon water delivery, there is no need for a power source, allowing for "significant fuel cost reduction"! Compared to underwater pump methods, fuel consumption is only 0.0007%! 【Reasons to Choose This Product】 ■ No power source is needed after the water delivery starts! Fuel costs can be reduced over a long period! ■ Switching the water delivery is easy, just turning the generator on and off! ■ NETIS certified product (Registration Number: CB-160016-A) ■ We will propose devices of φ200mm and φ100mm according to site conditions. *For more details, please feel free to contact us.

• Drainage and water removal

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

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

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 using natural stones. We also provide explanations about the terraced rice field fish passage, consultations on fish passage design (including drawing creation and quantity calculation), proposals, and assistance, so please feel free to contact us. 【Case Study】 ■ Project Name: Daiwa Repair No. 7 Prefectural River Maintenance and Repair ■ Construction Location: Asukagawa (Gifu Prefecture) ■ 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 the 180-degree design, preventing fish from lingering. ■ It features a maintenance-free structure that prevents sediment accumulation inside the fish passage. ■ Its unique structure can accommodate changes in water levels, allowing water to flow from the collection ditch beneath the floor during low water conditions. ■ By realizing the concrete secondary productization as terraced rice field fish passage blocks, we 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

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

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

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 Fishway," which features a unique shape utilizing natural stones. We also provide explanations about the terraced 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: No. 2 General River Basin Disaster Prevention (River Environment Project) Construction ■Construction Location: Asukagawa (Gifu Prefecture) ■Construction Photos: Please see the construction photos on this page. 【Reasons to Choose 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 under the floor during low water periods. ■By realizing the concrete secondary productization as terraced 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The hybrid Yamatachi siphon drainage device starts by using a "submersible pump" to inject "priming water" into the "siphon drainage pipe." It is a drainage system that utilizes natural energy to activate the siphon effect even without electricity or the use of a submersible pump, by employing a water storage tank. 【Features】 ■ Achieves significant cost reduction due to new drainage technology that does not use electricity and relies on natural energy. ■ Contributes to global warming prevention by emitting no greenhouse gases such as CO2 (carbon dioxide). ■ Helps prevent the depletion of Earth's resources by not consuming fuel necessary for power generation. ■ Usable in various locations. *For more details, please contact us.

• Drainage and ventilation equipment

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

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

Using electricity only for the first 1-2 minutes at startup! An energy-saving, environmentally friendly siphon-type submersible pump, hybrid eco pump. 【Features】 ○ Since electricity is only used at startup, fuel costs are significantly reduced. ○ Maintenance tasks such as refueling and flow adjustment are unnecessary, reducing the labor required for these tasks. ○ The short duration of fuel usage leads to a proportional reduction in CO2 emissions. ○ There are no concerns about noise from generators, so you can use it safely even at night. ● For other functions and details, please contact us.

• Earthworks
• Pile and foundation work
• Prime movers, torque converters, hydraulic equipment, generators

Cost reduction at construction sites has been achieved with the river environment, thinned wood products, and natural stone block series. 【Features】 ○ Blocks made from natural stone are pre-assembled, allowing construction to proceed without the need for skilled labor. ○ By using natural stone, the bank strength can be maintained without disrupting the beautiful landscape of the area. ○ One of the features is that it is designed to allow coexistence without changing the habitat for animals and plants. ○ It is suitable for various construction projects such as roads and bank retaining walls. ● For other functions and details, please contact us.

• stone