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  5. Slope protection material
  6. Greening with natural materials: The power of straw becomes the power of greening.

Greening with natural materials: The power of straw becomes the power of greening.

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last updated:Mar 31, 2026

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Is straw actually amazing!? I'll reveal the secrets of straw that are useful for slope greening! [Free materials available]

"Wara," a byproduct of rice with various effects. For over 50 years, Rontai has developed numerous greening products using this wara. We would like to introduce "The Power of Wara," compiled based on the knowledge and know-how that Rontai has cultivated over the years. In slope greening, there is a growing demand for consideration of the environment and biodiversity. We often receive inquiries about how to green in a way that reduces environmental impact. For those facing such concerns: "What benefits does using wara provide?" "How should I choose it?" "What methods can further improve workability?" This document summarizes these three perspectives. Please try the effects of wara, which pairs well with greening. [Contents] ■ The Power of Wara Useful for Greening ■ Rontai's Wara Product Lineup ■ Points for Improving Workability

    Slope protection material
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Greening with natural materials: The power of straw becomes the power of greening.

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For more details, please refer to the materials. Feel free to contact us with any inquiries. At Rontai, we conduct free slope surveys at construction sites. For more information, please contact your nearest branch or sales office.

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●For details of the materials, please download and view the PDF. *If you have any questions about the details, please feel free to contact us.

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Straw Power PR Materials

Straw Power PR Materials

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[Catalog] Artificial Turf "Ronquet Wara"

[Catalog] Artificial Turf "Ronquet Wara"

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[Catalog] Vegetation Sheet 'Ronquet Tunagreen'

[Catalog] Vegetation Sheet 'Ronquet Tunagreen'

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[Catalog] Biodegradable Turf (with Net) 'Ronquet Oga'

[Catalog] Biodegradable Turf (with Net) 'Ronquet Oga'

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[Catalog] Straw-attached decomposable vegetation mat (with fertilizer bag) 'Ronkette Oga (with fertilizer bag)'

[Catalog] Straw-attached decomposable vegetation mat (with fertilizer bag) 'Ronkette Oga (with fertilizer bag)'

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[Catalog] Biodegradable Turf "Ronquet de Agreen"

[Catalog] Biodegradable Turf "Ronquet de Agreen"

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[Catalog] Native Species Cultivation Type Vegetation Mat 'Ronquet Mossana'

[Catalog] Native Species Cultivation Type Vegetation Mat 'Ronquet Mossana'

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[Catalog] Erosion Control Type Straw Grass "Ronkett Keeper"

[Catalog] Erosion Control Type Straw Grass "Ronkett Keeper"

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[Catalog] Natural Invasion Promoting Vegetation Mat 'Ronquette Furaibou'

[Catalog] Natural Invasion Promoting Vegetation Mat 'Ronquette Furaibou'

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Building materials, supplies and fixtures manufacturers

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Gentle green spreads across the slopes of the road, blending into the landscape. This green may be what is called "slope greening," which is planned and planted during road construction. Our work in slope greening aims to prevent slope collapse, protect people's lives and communities, and restore damaged ecosystems. With the belief of "green that protects people," Rontai is committed to greening efforts.

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