Rooftop Greening Revolution: The "Evergreen Kiri Grass Bag Method" for a Successful Rooftop Greening System.

basic information

This is a method of evergreen giraffe grass planting bags using zipper-type planting bags (FTM bags). It is a triple intellectual property product consisting of a bag method (Patent No. 4911418 + Registered Trademark No. 6125712) and a variety registration (Variety Registration No. 15866). The triple intellectual property of the evergreen giraffe grass bag method (patent, trademark, variety registration) leads to successful rooftop greening. 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 can also be ordered. The rectangular type is used for wall greening and folded plate roof greening. The bags are made of root barrier sheets, preventing the intrusion of weeds and the scattering and runoff of soil. The bags allow the evergreen giraffe grass to provide moisture to the soil while preventing soil drying. The site will receive bags filled with soil and seedlings of evergreen giraffe grass, so you simply open the zipper of the bag, insert the seedlings, and close the zipper. It is a simple greening system that completes greening by just arranging the bags with plants.

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Applications/Examples of results

【Evergreen Giraffe Grass Bag Method Achievements】 〇 Over 500 private facilities 〇 Over 50 public facilities Many others 【Greening Applications】 〇 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】 〇 Government and public agency facilities, public buildings 〇 Factories, offices, commercial facilities 〇 Apartments, residential buildings 〇 Civil engineering structures, erosion control dams, slopes 〇 Ground cover 〇 Weed control

Detailed information

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  Soil Erosion Experiment One of the causes of rooftop greening failures is "soil erosion." We recreated heavy rain by bursting large water balloons and conducted an erosion experiment comparing the rooftop greening systems "bag method vs. conventional method." Recently, extreme weather events have increased, and the amount of rainfall exceeding 80 mm per hour, referred to as "intense rain," has increased by about 1.7 times over the past 30 years. Such heavy rain can wash away the soil and plants from rooftop greening, causing issues like clogged drainage systems. For a video comparing soil dispersion experiments, please visit https://kirinsou.jp/system/#experiment1.

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  Soil Dispersal Experiment One of the reasons for the failure of rooftop greening is "soil dispersal." We conducted a dispersal experiment comparing the rooftop greening systems "bag method vs. conventional method" by creating strong winds using a blower and a circulator. Recently, there has been an increase in abnormal weather, and it is predicted that the number of very strong tropical cyclones with maximum wind speeds exceeding 45 m/s over the sea (or ground) is on the rise. In such severe weather, the soil and plants from rooftop greening can be dispersed, leading to problems such as clogging drainage systems. For the video of the soil runoff comparison experiment, please visit https://kirinsou.jp/system/#experiment2.

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  Rooftop Greening Revolution: A Rooftop Greening System That Doesn't Fail - "Evergreen Kiri Grass Bag Method" Case Study: Roof Greening This is roof greening using the rooftop greening system "Evergreen Kiri Grass Bag Method," which does not fail. Since it is on the roof surface, it is secured with a scatter prevention 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 tourist 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 opposition arose from Sensoji 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 rooftop greening revolution and the "Evergreen Kiri Grass Bag Method" that doesn't fail, please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: 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, with curved sections throughout the rooftop greening. It cannot be accommodated by conventional tray-style greening. The Evergreen Kiri Grass Bag Method also accommodates square bags of 50cm, 25cm, and rectangular bags of 15cm x 50cm. Since the bags are flexible, they can be shaped on-site, allowing for customization to fit the rooftop's design. The flexibility of the bags also enables greening on curved surfaces. For more details about the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Rooftop Greening (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 temperatures 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 Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Case Study: Rooftop Greening (Greening by Children, Rooftop Greening by Middle School Students) To combat the summer heat at the community meeting place, we implemented the Evergreen Kiri Grass Bag Method. The meeting place is a prefabricated building, making it quite hot in the summer as the air conditioning does not work well. The greening was done by the children of the neighborhood. The bags of evergreen Kiri grass come with name tags, allowing participants to write their names. By participating in greening activities, the children's feelings towards community development improve, and a sense of attachment to the plaza also develops. For more details on the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Failsafe Rooftop Greening System "Evergreen Kirinsou Bag Method" Case Study: Slope Greening A sediment control dam, known as a "sabouentai," is a type of dam installed in rivers. It is also referred to as a "sediment control dam." This facility captures harmful sediment such as debris flows that come from upstream and gradually releases the accumulated sediment, thereby regulating 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 riverbanks from being eroded, and weakening the destructive power of debris flows. 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 that greening has also posed challenges. 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 Rooftop Greening Revolution and the failsafe rooftop greening system "Evergreen Kirinsou Bag Method," please visit https://kirinsou.jp.

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  Rooftop Greening Revolution: A Fail-Proof Rooftop Greening System "Evergreen Kiri Grass Bag Method" Construction Example: 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, so it does not grow wildly and change the shape of the letters. The bag method is made with weed control sheets, effectively preventing weed intrusion and soil erosion. With such low-maintenance plants and the bag method, it becomes possible to create letters through this greening system. For more details on the Rooftop Greening Revolution and the fail-proof rooftop greening system "Evergreen Kiri Grass Bag Method," please visit https://kirinsou.jp.