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  6. Evergreen giraffe grass bag method: weed prevention and soil erosion prevention rooftop greening system.

Evergreen giraffe grass bag method: weed prevention and soil erosion prevention rooftop greening system.

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Evergreen Giraffe Grass Bag Method

last updated:Jan 13, 2026

緑化計画研究所
緑化計画研究所
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Evergreen gromwell bag method. A rooftop greening system chosen by professionals. An innovative greening system introduced in Gaia's Dawn. No need for watering and no worries about weeds!

The Evergreen Kiri Grass Bag Method® (FTM Bag) is a groundbreaking rooftop greening system that utilizes zipper-type planting bags, unlike anything seen before. (Rooftop Greening Revolution) **Features of the Evergreen Kiri Grass Bag Method** - Soil erosion prevention - Weed control - Easy greening - Low maintenance - No watering required The Evergreen Kiri Grass Bag Method is a new greening approach that achieves "soil erosion prevention," "weed control," and "easy greening" by placing specialized soil for evergreen kiri grass into bags. **Greening Applications** - Rooftop greening - Folded plate roof greening - Wall greening - Slope greening - Erosion control dam greening - Roadside greening - Concrete slope greening - Slope protection - Retaining wall greening - Environmental greening - Weed control greening - Weed control under solar panels - Landscape preservation, etc. Recently, intense rains like guerrilla downpours have caused issues with soil runoff and wind dispersal in rooftop greening. Additionally, the decline of plants and the proliferation of weeds have become significant problems in rooftop greening. The solution to these issues is the "Evergreen Kiri Grass Bag Method: A Rooftop Greening System That Doesn't Fail." The Evergreen Kiri Grass Bag Method is a new greening approach that overcomes the problems of traditional rooftop greening.

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Evergreen giraffe grass bag method: weed prevention and soil erosion prevention rooftop greening system.

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basic information

The Evergreen Kiriin-so Bag Method® (FTM Bag) is a groundbreaking rooftop greening system that utilizes a zipper-type planting bag, unlike anything seen before. It is a triple intellectual property product consisting of the bag method (Patent No. 4911418 + Registered Trademark No. 6125712) and variety registration (Variety Registration No. 15866). The triple intellectual property of the Evergreen Kiriin-so Bag Method (patent, trademark, and variety registration) leads to a fail-proof rooftop greening solution. 1. Prevents the intrusion of weeds 2. Prevents soil runoff 3. Easy installation with a zipper The standard size of the bag method is 50 cm square, with a wet weight of 13 kg per bag. There is also a rectangular type measuring 15 cm x 100 cm available. Grommet options and custom sizes are possible. The bags are made of root barrier material, which stops the intrusion of weeds and prevents soil scattering and runoff. The bags allow the Evergreen Kiriin-so to provide moisture to the soil while simultaneously preventing soil drying. The site will receive bags filled with soil and seedlings of Evergreen Kiriin-so, so you simply open the zipper of the bag, insert the seedlings, and close the zipper. This is a simple greening system that completes the greening process by just arranging the bags containing the plants.

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Applications/Examples of results

【Evergreen Giraffe Grass Bag Method Achievements】 - Over 500 private facilities - Over 50 public facilities - Numerous others 【Greening Applications】 - Rooftop greening, folded plate roof greening, wall greening, slope greening, erosion control dam greening, road greening, concrete slope greening, environmental greening, weed control under solar panels, etc. 【Applications】 - Government and public agency facilities - Factories, offices, commercial facilities - Condominiums, residential buildings - Civil engineering structures, erosion control dams, slopes - Ground cover - Weed control

Detailed information

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    Failure-proof rooftop greening system "Evergreen Kirinsou Bag Method" case study: Rooftop greening This is a 720 square meter rooftop greening (for a self-propelled multi-story parking lot) using the failure-proof rooftop greening system "Evergreen Kirinsou Bag Method." The parking spaces on the rooftop have been greened. In the future, if the number of cars increases, there is a consideration to revert the greening back to parking spaces. With the "Evergreen Kirinsou Bag Method," the greening areas can be easily relocated. Soka Matsubara Housing Complex was a UR rental housing developed by the former Japan Housing Corporation located in Soka City, Saitama Prefecture. Occupancy began in 1962 (Showa 37), and at the time of its completion, it was said to be the largest scale in the Orient, a massive housing complex. Due to aging, a rebuilding project is being carried out in stages. For more details on the failure-proof rooftop greening system "Evergreen Kirinsou Bag Method," please visit https://kirinsou.jp.

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    A fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method" case study: Roof greening This is roof greening using the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method." Since it is on the roof surface, it is secured with a windbreak net. The Asakusa Culture and Tourism Center is a tourist information facility located in Taito Ward, in front of the Kaminarimon Gate. The first floor features an information counter that supports Japanese, English, Korean, and Chinese, as well as a foreign currency exchange service, while the second floor has a tourism information corner. The top floor, the 8th floor, is a free observation terrace. Due to the existing building being over 50 years old and deteriorating, a competition was held in 2008, and the proposal by Kengo Kuma was adopted. The initial plan had a height of 41.25 meters, but voices of opposition arose from Senso-ji Temple and the local shopping district, claiming it would disrupt the harmony of the streetscape, leading to a reduction of about 2 meters, resulting in a height of 38.9 meters. In 2012, it received the Good Design Award. For more details on the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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    Fail-proof rooftop greening system "Evergreen Kirinsou Bag Method" construction example: Slope greening A sediment control dam is a type of dam installed in rivers. It is also referred to as a "sediment control dam." This facility receives harmful sediment flowing downstream from landslides and other sources, and by gradually releasing the accumulated sediment, it regulates the amount of sediment flowing downstream. By accumulating sediment in the sediment control dam, the slope of the river becomes gentler, preventing the riverbed and banks from being eroded, and weakening the destructive power of landslides. Additionally, it helps stabilize the foothills on both sides, preventing landslides on the mountain slopes. However, the construction of large concrete walls in mountainous areas can lead to landscape issues. Until now, greening sediment control dams has been difficult, and maintaining the greenery has also been challenging. The Evergreen Kirinsou Bag Method has made it possible to easily green these areas. The greening of sediment control dams blends well with the surrounding scenery. For more details on the fail-proof rooftop greening system "Evergreen Kirinsou Bag Method," please visit https://kirinsou.jp.

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    Evergreen Kirinsou Case Study: Solar Sharing + Greening Solar sharing refers to the initiative of installing solar panels on supports erected in agricultural land to regulate sunlight and share solar energy between agricultural production and electricity generation. The Ministry of Agriculture, Forestry and Fisheries refers to this power generation equipment as "agricultural-type power generation equipment." By effectively utilizing the upper space of agricultural land while continuing farming, it is possible to generate electricity, which supports agricultural management. Furthermore, it is also expected to contribute to the regeneration and reuse of increasing abandoned farmland. Evergreen Kirinsou is produced under the solar panels. The Evergreen Kirinsou cultivated here is actively used nationwide for rooftop greening, wall greening, and slope greening. For more details on the fail-safe rooftop greening system "Evergreen Kirinsou Bag Method," please visit https://kirinsou.jp.

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    Fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method" case study: Rooftop greening (by middle school students) The students themselves transported materials to the rooftop, planted in bags, and arranged the bags to complete the rooftop greening. The photo below was taken as a graduation memory. The school's science club took the lead in this rooftop greening project. The science club measured the temperature of classrooms that were not greened and the classroom directly below the rooftop greening, using thermography to investigate the temperature distribution in the classrooms. In the classroom directly below the rooftop greening, the overall temperature was shown in blue, confirming the effectiveness of the rooftop greening. For more details on the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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    A fail-proof rooftop greening system: "Evergreen Kiri Grass Bag Method" case study: Rooftop greening (also accommodates curves) This is a rooftop greening project of approximately 180 square meters using the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method." The greening area is divided into buildings A to D, and the shape is not rectangular, featuring curves in all areas. This cannot be accommodated by conventional tray-based greening. The Evergreen Kiri Grass Bag Method was adapted using square bags of 50cm, 25cm, and rectangular bags of 15cm x 50cm. The bags are flexible, allowing for shape adjustments on-site. Additionally, custom sizes can be ordered, enabling rooftop greening tailored to the site. The flexibility of the bags also allows for greening on curved surfaces. For more details about the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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    Fail-proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Slope Greening Using the Evergreen Kiri Grass Bag Method, we implemented greening with letters as a landmark for the interchange. Evergreen Kiri Grass is resilient to heat, cold, and drought, making it a low-maintenance plant. It replaces its new shoots around November, ensuring that it does not grow uncontrollably or change the shape of the letters. The bag method is made from weed control sheets, effectively preventing weed intrusion and soil erosion. With this combination of low-maintenance plants and the bag method, it is possible to create such lettering through a greening system. For more details on the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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    Fail-proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Rooftop Greening (Renovation of Existing Greening) This is a renovation project for the existing rooftop greening on the 5th floor of a 10-story apartment building shaped like a "U" with a courtyard. The original rooftop greening was done with sedum, but it had become overrun with weeds, causing issues. The request was to renovate while preserving the existing parts. The shape of the building resembles a pyramid, making it a challenging site for transporting materials. Since cranes could not be used, all materials were handled manually, and a temporary emergency hatch was utilized for material delivery. After removing the surface weeds, we treated the area to prevent weed germination. Subsequently, we laid down a weed barrier and performed greening using the Evergreen Kiri Grass Bag Method. For more details on the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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緑化計画研究所

緑化計画研究所

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In manufacturing, there are people, and in projects, there is drama. The "passion" of three individuals transcends the boundaries of the company, leading to "co-creation" and "hope." In April 2007, at an exhibition, a project team was born. They wanted to create new solutions originating from the field to solve customers' problems. Three professionals who shared such passionate thoughts met, and the Evergreen Kiri-Sou Promotion Association was established. Professionals in plants, architecture, civil engineering, and facilities breathe new life into the city. Moments of inspiration are continuous. The opportunities to experience moments where the heartbeat never stops are becoming fewer. Why is that? Perhaps it is because of the increase in fakes and deceptions. We aim to remain professionals involved in plants, architecture, civil engineering, and facilities, and we operate the Evergreen Kiri-Sou Promotion Association. The professionals have developed new greening methods and greening systems. That is the Evergreen Kiri-Sou bag method.

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