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In June 2025, disaster prevention measures for historic sites and cultural properties were incorporated into the first mid-term plan for national resilience. The unit net method has been adopted in many situations where landscape considerations are important. Moving forward, we aim to contribute to the protection of cultural properties and the prevention of human damage as a method that can balance landscape considerations and slope preservation. 【Features】 - This method suppresses surface landslides (up to about 3-4 meters thick). - Rock bolts and unit nets are connected by pressure plates, and their interaction stabilizes the slope. - Its open shape allows for minimal tree cutting. - The lightweight components excel in narrow areas, enabling efficient construction and shortening the construction period. 【Reasons for Adoption in Major Historic Sites and Cultural Properties】 - Landscape considerations are required near historical cultural properties. - The construction sites and access routes are narrow, making it impossible to secure large construction yards for methods like shotcrete frame construction. (The unit net is lightweight and easy to transport, eliminating the need for large construction yards.) - Cost reduction and shorter construction periods are possible compared to conventional methods, such as frame construction with rock bolts.

• Civil Engineering Method

【Features】 - Made of 100% polyester, it is corrosion-resistant and lightweight (about 1/5 the weight of conventional φ3.2mm wire mesh). - It has a long-term durability of over 60 years. - Woven with a double twist in a hexagonal pattern, preventing continuous mesh breakage. - It does not rust and is suitable for repairs over deteriorated wire mesh.

• Slope protection material

The dry mat is a composite mat that consists of a wave net made of a three-dimensional mesh structure of polyester, impregnated with special cement mortar, measuring 5mm thick and 60cm wide. Before use, it is soft and fits the unevenness of the ground, and after being secured with anchors, it hardens through hydration reactions from watering or rainwater, serving as an erosion prevention mat.

• Civil Engineering Sheet

【Features】 ○ An environmentally friendly ground reinforcement method that allows for forest protection, landscape preservation, and greening of slopes. 〇 It can be constructed even in narrow sites such as residential areas by using lightweight materials. ○ Compared to conventional methods using retaining walls and rebar insertion, it can reduce costs and shorten construction periods. 〇 Applicable in cut slopes and landslide-prone areas when used in conjunction with slope protection works such as wire mesh and vegetation mats. 〇 Proven track record of lifting special alert zones for sediment disasters (red zones). ○ Registered with the Ministry of Land, Infrastructure, Transport and Tourism NETIS under registration number KK-010068-V (published until April 2017). * For slopes with spring water, it is effective to combine with drainage work using "DK Drain Pipes." * We also have a collection of case studies from various fields, so please download from the catalog below!

• Slope protection material

【Features】 ○ An environmentally friendly ground reinforcement method that allows for forest protection, landscape preservation, and greening of slopes. 〇 No large machinery required; can be constructed in narrow sites using lightweight materials. ○ Compared to conventional methods that use retaining walls and rebar insertion, it can reduce costs and shorten construction periods. 〇 Applicable even on cut slopes and collapsed slopes when used in conjunction with slope protection methods such as wire mesh and vegetation mats. ○ Registered with the Ministry of Land, Infrastructure, Transport and Tourism NETIS registration number KK-010068-V (published until April 2017). In road slope applications, it allows for early traffic opening compared to conventional methods and can be constructed in small spaces, making it a preferred choice. In areas where landscape consideration is necessary, such as tourist spots, it can also be made less noticeable with colored specifications. ◆ A collection of case studies can be downloaded for free from the link below! If you have any questions, please feel free to contact us!◆

• Civil Engineering Method

The high-durability STK net is a rust-free polyester hexagonal net that serves as an alternative to wire mesh. Originally developed as a net for marine aquaculture, it has been repurposed for land applications, used for various purposes such as rockfall prevention, sediment control, wildlife damage prevention, and fall prevention. It is particularly adopted in the railway and road sectors due to its lightweight and durability (life cycle cost). You can download case studies from the link below. Please refer to it.

• Protective fence

This is a ground reinforcement construction method that connects rock bolts and unit nets with pressure plates to stabilize slopes through their mutual effects. It is often used on natural slopes because it allows for the preservation of trees, but it can also be applied in restoration work for collapsed areas and on cut slopes in conjunction with slope protection measures such as vegetation mats. 【Features】 - An environmentally considerate ground reinforcement construction method that allows for forest protection, landscape preservation, and greening of slopes. - No large machinery required; can be constructed in narrow sites using lightweight materials. - Compared to conventional methods that use frame supports and rebar insertion, it can reduce costs and shorten construction periods. - Applicable in cut slopes and collapsed slopes in combination with slope protection measures such as wire mesh and vegetation mats. - Proven results in the removal of special disaster warning areas (red zones). - Registered with the Ministry of Land, Infrastructure, Transport and Tourism under NETIS registration number KK-010068-V (published until April 2017). ◆◇ You can download a collection of disaster recovery case studies from the link below! ◇◆

• Civil Engineering Method

Asakura City, Fukuoka Prefecture, Haki Hoshimaru, Shimizu Moto District From July 5 to 6, 2017, due to the inflow of warm and very humid air towards the stationary rainy front near the Tsushima Strait, a linear precipitation zone was formed and maintained, resulting in extremely heavy rain in the same location. This led to record-breaking rainfall in the northern Kyushu region and caused a heavy rain disaster. In Asakura City, Fukuoka Prefecture, where this heavy rain disaster occurred, unit nets were adopted and constructed in 2014 as part of a steep slope collapse prevention project. You can view the situation near the unit net construction site immediately after the disaster on the Geospatial Information Authority of Japan's YouTube account. The back side of the three-story building (elementary school) shown around 1:40 in the video below is the site where the unit net method was implemented. Despite numerous landslides occurring in the surrounding mountains, the area where the unit net method was applied did not experience any landslides. For more details, please refer to our company's website column and materials (available for download below).

• Slope protection material

In recent years, with the increase in rainfall, the importance of slope measures in urban areas has been rising. In residential areas and public facilities, slope measures often face limitations in terms of delivery and construction space. However, the unit net method allows for delivery and construction in smaller spaces compared to traditional shotcrete frame work and rebar insertion methods. It is also ideal for areas where it is difficult to remove felled trees or where there is a desire to stabilize slopes while preserving greenery. We have a wealth of construction achievements, with approximately 1,000 cases and 710,000 m², including instances where special disaster warning areas (red zones) have been lifted. ◇◆ You can download the collection of construction examples from the link below. ◆◇ Please take a look!

• Civil Engineering Method

The Aspower Sheet is an asphalt pavement crack suppression sheet that is coated with a special asphalt that is impregnated into a fiberglass fabric. By laying it beneath the surface or in the intermediate layer of asphalt pavement, it is a product that has waterproofing capabilities and can suppress cracks in asphalt pavement. 【Areas We Serve】 Tokyo, Kanagawa, Chiba, Saitama, Gunma, Tochigi, Ibaraki, Yamanashi, Hiroshima, Okayama

• Paving Materials
• Paving of sidewalks, roads, parking lots and stadiums

The high-durability STK net is a rust-free polyester hexagonal net that serves as an alternative to metal wire. Originally developed as a net for marine aquaculture, it has been repurposed for land applications and is used for various purposes such as rockfall prevention, sediment control, wildlife damage prevention, and fall prevention. It is ideal for areas along the coast where salt damage is a concern, volcanic regions with acidic gas emissions, and cultural properties or scenic areas where aesthetics are important. It contributes to improved weight and workability, being about one-fifth the weight of traditional metal wire.

• Slope protection material

【Overview】 - It suppresses the erosion and runoff of surface soil on slopes using a polyester net and vegetation mat. 【Features】 - The specification materials are lightweight, making it possible to transport and deliver to relatively difficult sites such as narrow places and hillside works. - The use of a flexible net allows for close installation on uneven slopes. - By using a vegetation mat in conjunction, greening can be achieved.

• Erosion control works

Mikune District, Sayō Town, Sayō County, Hyōgo Prefecture ◆ Damage from Typhoon No. 23 in 2004 In response to the damage caused by Typhoon No. 23 in 2004, "unit nets" were adopted at planned locations for the restoration of windfall trees and slope collapses, and construction was sequentially ordered based on the plan. ◆ Damage from Typhoon No. 9 in 2009 While construction was progressing sequentially for restoration measures, we were hit by damage from Typhoon No. 9 in 2009. Slope collapses occurred in surrounding areas, centered around the restoration plan area. Although there were still unaddressed areas within the restoration plan that experienced slope collapses, the adjacent area where "unit nets" had been installed was able to prevent collapses. There were houses below the slopes, but thanks to the installation of "unit nets," safety was successfully maintained. ● For more details, please download the materials.

• Civil Engineering Method

The "DK Drain Pipe" is a new type of driven drainage pipe made of stainless steel, designed to be driven into the ground with threaded ends (male and female threads) to drain water from the ground, lower the groundwater level, and prevent slope collapse. 【Features】 ■ Improved durability and cost-effectiveness - By using stainless steel for the pipe material, it is resistant to rust, which can reduce lifecycle costs. ■ Improved workability - The pipe can be driven directly without prior drilling. - By striking the tip bit attached to the end of the pipe, the impact force is directly transmitted, making it easier to drive in. - The threaded ends of the pipe allow for easy connection between pipes. ● Please download the catalog for the construction procedure.

• Civil Engineering Method
• Drainage and water removal
• Drainage material