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ロンタイ

Establishment1957 year
capital6300Ten thousand
number of employees121
addressOsaka/Moriguchi-shi/3-1-11 Kameda-cho
phone06-6902-9401
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last updated:May 11, 2026
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ロンタイ List of Products and Services

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Natural invasion promotion type Natural invasion promotion type
Products with wire mesh Products with wire mesh
NETIS registered products NETIS registered products
sandbag sandbag
Earthwork products Earthwork products
Cutting soil products Cutting soil products
Straw-wrapped product Straw-wrapped product
Greening of hard surfaces and rock formations Greening of hard surfaces and rock formations
Environmentally friendly products Environmentally friendly products
Erosion control type Erosion control type
Market unit price product Market unit price product
Traditional variety breeding type Traditional variety breeding type
Economic product Economic product
Vegetation bag Vegetation bag
Blowing-related materials Blowing-related materials
Seed Seed
Pin Pin
Work schedule, placement diagram, construction method Work schedule, placement diagram, construction method
Case studies Case studies
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Email Newsletter Corner Email Newsletter Corner
sandbag

sandbag

Introducing the Ron Tai vegetation soil bag.

Vegetation Soil Bag "Makura Green Bag"

■■ Elongated shape for preventing shoulder erosion ■■ Greening of the backfill area ■■

The "Pillow Green Bag" is a slender type of vegetation bag that is ideal for preventing erosion on slopes and greening backfilled areas. When arranged along the slope, it prevents rainwater infiltration and erosion, protecting the vulnerable slope areas. Additionally, it allows for simultaneous greening during backfilling of vertical drainage ditches and foundation areas! It is covered with seeds and fertilizer on all sides, making it possible to install in any orientation. 【Features】 ■1 package: 200 pieces ■Due to its slender shape, it is perfect for filling gaps in waterways and blocks! ■Proven track record in erosion control and road improvement projects! ■The amount of fill soil required is about half of conventional bags! ■Lightweight, making it easy to transport! *Please download the construction case collection from the form below.

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Vegetation Soil Bag "Green Bag"

■■Longtai's popular products■■ Fully equipped with seeds and fertilizers■■

Rontai's popular product, the "Green Bag," is a vegetation bag that can produce stable germination by attaching seeds and fertilizers to the entire surface of the sandbag. 【Features】 ■ Seeds and fertilizers are attached to the entire surface ■ Can be installed without worrying about the front or back ■ 1 package: 100 pieces ■ Filled with on-site generated soil ■ Reasonable price ■ By innovating the stacking method, it can be utilized in various sites It can be installed with simple tasks such as bagging, stacking, nailing, and horizontal transportation. It can be used in various sites by innovating the stacking method for backfilling slope collapse areas, protecting transmission towers, grass-lined ditches, etc.! If you scroll down, you will find materials such as catalogs, case studies, and installation methods, so please download them! ---------------------------------------------------- Rontai offers free slope surveys at construction sites. For more details, please contact your nearest branch or sales office. ----------------------------------------------------

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"Green Bag" Vegetation Soil Construction Troubleshooting Guide!

I have compiled the required soil volume, placement drawings, and work rates for the green bag.

In this document, you can find the required quantity of vegetative soil bags "Green Bags," construction drawings and labor costs for each method, as well as the necessary soil volume. A table is included that calculates the required quantity based on slope and length. If you are considering vegetative soil bags and have concerns about construction, please make use of this information. 【Contents】 ◎ Required soil volume for vegetative soil bags ◎ Soil bag usage table based on slope and length ◎ Construction drawings and labor costs for different scenarios (small pile stacking / side stacking / 10% slope for embankments / 6% slope for embankments / grass-lined ditches) *This document can be viewed immediately via "PDF Download." Please feel free to contact us with any inquiries.

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[Construction Case Studies] Vegetation Soil Bags 'Makura Green Bag'

◆◆Ideal for preventing erosion of the shoulder with a slender shape◆◆ Greening of backfill ◆◆

Vegetation sandbags in a rectangular shape, ideal for preventing erosion on slopes. We would like to introduce examples of construction using the "Makura Green Bag." In addition to details such as the construction conditions and quantities of the Makura Green Bags used in sidewalk improvements and restoration forestry projects, we have included photos showing the progress of greening after construction. For a limited time, we are offering a free collection of case studies! [Featured Case Studies] ■ Project Name: FY 2016 Restoration Forestry Project (Kagoshima) ■ Conditions: Other ■ Use: Forestry and forest road ■ Quantity: 200 bags *For more details, please refer to the catalog or feel free to contact us. —————————————————————————————————— Rontai offers free slope surveys at construction sites. For more information, please contact your nearest branch or sales office. ——————————————————————————————————

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[Construction Achievements] Large Vegetation Soil Bag 'Green Scram' NETIS Registered Product

■Disaster prevention measures considering the landscape■Available for purchase from one piece■

The "Green Scram" that our company handles is a "large vegetation sandbag" that balances landscape conservation and disaster recovery. Since it is equipped with seeds and fertilizers, it promotes plant growth and suppresses the degradation of the sandbag itself. It is very useful for preparing for localized heavy rain, landslides, and typhoons, as well as for recovery after damage. 【Features】 ■ Disaster prevention measures that consider the landscape ■ Good workability and shortened construction period ■ Can be installed for a long time ■ NETIS registered product ■ Available for sale from one piece *For more details, please refer to the PDF materials or feel free to contact us.

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Large sandbags with vegetation functions "Green Scram"

Large sandbags with vegetation functions! Contributing not only to disaster prevention and reduction but also to environmental conservation! *We are currently seeking construction case studies.*

The large sandbag "Green Scram" is a product that adds vegetation functionality to the "sandbags" used in disaster recovery and temporary construction. The vegetation function helps to suppress the degradation of the product, while also demonstrating the excellent workability unique to large sandbags. 【Features】 ■ Suppresses product degradation with vegetation functionality ■ Promotes greening with a flexible, larger mesh size ■ Structure prevents the inner soil from spilling out ■ Available for purchase from a single unit, allowing for purchases tailored to the scale of the site Please avoid using sand, gravel, rocky soil, concrete debris, mortar waste, etc., for filling. *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

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[NETIS Registered Product] Large Vegetation Soil Bag 'Green Scram'

■■Landscape conservation and disaster recovery■■Available for purchase from one sheet■■

Our product, "Green Scram," is a "large vegetative sandbag" that excels in disaster prevention and recovery sites! Equipped with seeds and fertilizers, it allows for disaster prevention measures that consider the landscape! Additionally, since the surface is covered with vegetation, it helps to suppress the degradation of the sandbag itself. It is extremely useful for preparing for localized heavy rain, landslides, and typhoons, as well as for recovery after damage! 【Features】 ■ Disaster prevention measures that consider the landscape ■ Good workability and shortened construction period ■ Suppresses degradation of the sandbag itself ■ Can be installed for long periods ■ Available for purchase from just one piece *For more details, please refer to the PDF materials or feel free to contact us.

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[Technical Information] We will answer questions regarding NETIS registered products!

Large Vegetation Sandbags - Reinforcing Fibers for Mortar and Concrete Spraying

What is the maximum height for stacking the large vegetation sandbags "Green Scram"? What is the stacking slope? How do you fill the bags with soil? What is the size after filling with soil? Is it possible to move them after installation? What is different about the mortar and concrete spraying reinforcement fiber "Basalon Fiber" compared to conventional reinforcement materials? How is the workability? Are there any points to be cautious about? We are answering frequently asked questions from customers! 【NETIS Registered Products】 - Large vegetation sandbags "Green Scram" - Mortar and concrete spraying reinforcement fiber "Basalon Fiber" 【NETIS Expired Products】 - Erosion control vegetation mat "Kilket M type" - Erosion control vegetation sheet "Kilket S type" - Soft rock and hard soil vegetation mat "Shirokumatt" - Native species cultivation vegetation mat "Ronket Mosana" - Biodegradable turf (with net) "Ronket Orga" - Thinning wood utilization vegetation mat "Mori no Taro" *This document can be viewed immediately via "PDF Download." Feel free to contact us with any inquiries.

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[Comprehensive Case Collection] Vegetation Sheets, Mats, and Sandbags (By Application)

Choose products that fit the site! A variety of examples categorized by use are available.

We are currently offering a "Comprehensive Case Collection" that showcases examples of our vegetation sheets, vegetation mats, and sandbags categorized by their applications, such as disaster recovery. Most examples include site conditions and before-and-after photos, making the effectiveness of our products immediately clear. You can smoothly find the perfect product for your site from our wide range of product offerings. 【Classification of Published Cases】 ■ Rivers and Erosion Control ■ Dams and Reservoirs ■ Farms and Fields ■ Land Development, Parks, and Solar Power ■ Mountain Conservation and Forest Roads ■ Disaster, Recovery, and Prevention ■ General Roads and Highways *This document can be viewed via "PDF Download."

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Introduction of domestically produced seeds 【Rontai】

At Rontai, we handle three types of domestically produced seeds: Japanese pampas grass, power grass, and mugwort!

Domestic Ron Tai seeds refer to indigenous species that are cultivated or collected from the wild within the country. We carry out the collection, selection, and germination testing in-house. For details regarding blends and inventory, please contact your nearest branch or sales office. *Please note that due to limited collection quantities, we do not sell domestic seeds exclusively. They are sold as products containing domestic seeds. *This document can be viewed immediately via "PDF Download." Feel free to reach out with any inquiries.

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Vegetation mat "Ronquet DX" / Vegetation soil bag "Green Bag"

Early greening is possible! Two products that are active in disaster recovery for slopes. Case studies are presented.

Our company offers products that are effective for "early greening and erosion prevention" at restoration sites where slopes have collapsed due to natural disasters. The vegetation mat for cutting, "Ronquet DX," promotes seed germination and growth through high water retention and nutrient-holding soil amendments, achieving early greening. Additionally, a special polyester non-woven fabric prevents surface erosion and sediment runoff! The vegetation bag "Green Bag" is covered with seeds and fertilizers on all sides, allowing for installation regardless of direction or orientation. Simply fill and install with locally generated soil to achieve greening, and it is also used for backfilling collapsed slope areas. Ronquet DX - Enables speedy construction as no construction machinery is required. - Offers four grades to choose from based on soil type and conditions. - Compatible with wire mesh products. Green Bag - Effective for protecting structures and preventing sediment runoff behind retaining walls. - Can achieve greening even at the ends of bags in favorable moisture conditions. - Fully equipped with seeds and fertilizers. *You can view materials with construction examples from the "Download" section.

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Slope Protection NETIS Registered Product Introduction Flyer

Introducing Rontai's NETIS registered products◎

Introducing Rontai's NETIS registered products! 【NETIS Registered Products】 - Large vegetation soil bag "Green Scram" - Reinforcing fiber for mortar and concrete spraying "Basaron Fiber" 【Products with Expired NETIS Listing Period】 - Erosion control vegetation mat "Kilket M Type" - Erosion control vegetation sheet "Kilket S Type" - Vegetation mat for soft rock and hard soil "Shiroku Mat" - Native species cultivation vegetation mat "Ronkette Moss Ana" - Biodegradable turf (with net) "Ronkette Orga" - Thinning wood utilization vegetation mat "Mori no Taro" *This document can be viewed immediately via "PDF Download." Please feel free to contact us for inquiries.

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[Helpful Materials] We will assist with the quantity calculation and stability calculation of vegetation soil bags!

For those struggling with the quantity of vegetation soil bags! Rontai will handle quantity and stability calculations for you.

At the site, those using vegetative soil bags often have common concerns such as, "How do I stack them for on-site construction? I don't know how many I need..." and "Is a stability calculation necessary for the slope at this site?" Longtai can solve these problems! For over 65 years, Longtai has been manufacturing the above-mentioned greening materials for "vegetative construction" to protect slopes. These products can be installed manually, eliminating the need for large machinery, allowing for quick greening protection even in narrow or small areas. As a result, many of our products are actively used in disaster recovery sites. Among them, the vegetative soil bag "Green Bag" is equipped with seeds on all sides, has good workability, and is one of our best-selling products. Depending on the site, various stacking methods and construction techniques are used, but we often receive inquiries about how many bags are needed for certain stacking methods. If you let us know the necessary conditions for your site, Longtai will provide quantity and stability calculations free of charge! If you are facing challenges at the site, feel free to download our materials and consult with Longtai☆

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Natural decomposition type sandbag "Coconut Net Bag"

Natural biodegradable sandbags made from palm fibers, greening with locally generated soil.

The "Yashi Net Bag" is a sandbag product made from palm fiber netting shaped like a bag. While it has the functionality of a sandbag, it is made entirely from materials that naturally decompose, so it does not impact the surrounding environment or ecosystem. *This product is only the sandbag itself and does not include seeds or fertilizers. A separate set of fertilizers or seeds can be sold as an addition. 【Features】 ■ Biodegradable product ■ Greening with locally sourced soil ■ Ideal for sites that require maintenance due to its natural decomposition *For more details, please refer to the catalog or feel free to contact us. -------------------------------------------------------------------------------- Rontai offers free slope surveys at construction sites. For more information, please contact your nearest branch or sales office. --------------------------------------------------------------------------------

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