Historical Site and Cultural Property Slope Measures Unit Net Method with Landscape Consideration
Protecting lives and cultural properties from heavy rain disasters. We can achieve both landscape consideration and slope preservation, with a proven track record near many cultural properties.
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.
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Main historical sites, world heritage sites, and cultural properties with unit net construction achievements <Chiba Prefecture> [Prefecture] Inohana Park <Kanagawa Prefecture> [National] Nagoshi Kiritō / [National] Kenchō-ji <Ishikawa Prefecture> [National] Kanazawa Castle Park / [National] Isurugi Mountain / [City] Fudō Falls <Yamanashi Prefecture> [National] Lake Shōjin <Shiga Prefecture> [National] Sugaura / [National] Jōken-ji / [Prefecture] Sabakatō Shrine <Kyoto Prefecture> [National] Kinkaku-ji / [National] Tōjiin <Osaka Prefecture> [National] Kawai-ji / [City] Minoo Park (Taki Anji) <Hyōgo Prefecture> [National] Genbudo <Nara Prefecture> [National] Asuka Historical National Park, Iwato District / [National] Hōryū-ji / [National] Kasugayama Primeval Forest <Wakayama Prefecture> [National] Kumano Kodo (Nakahechi) <Shimane Prefecture> [National] Iwami Ginzan <Okayama Prefecture> [National] Shidozaka Pass <Fukuoka Prefecture> [Prefecture] Kurosaki Castle Ruins / [City] Nabekari Shrine <Oita Prefecture> [National] Yabakei Nakama District <Kagoshima Prefecture> [National] Sengan-en / [National] Yakushima / [National] Amami Oshima 〇 Symbols [National] ... Nationally designated historical sites, scenic spots, cultural properties (including the storage of cultural properties), world heritage sites, etc. [Prefecture] ... Prefecturally designated historical sites, scenic spots, cultural properties (including the storage of cultural properties), etc. [City] ... Municipally designated historical sites, scenic spots, cultural properties (including the storage of cultural properties), etc.
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Construction case on the slope near Kinkaku-ji.
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Construction case study at Horyu-ji Temple
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Example of construction at Asuka Historical Park (before vegetation substrate spraying)
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Example of construction at Asuka Historical Park (after spraying vegetation substrate)
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Example of construction at Kanazawa Castle Park (natural slope area)
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Daika Corporation has contributed to the development of Japan's social infrastructure through the sale of industrial explosives since its establishment in 1931. Currently, the range of products handled by Daika includes industrial explosives, construction materials, slope disaster prevention technology, and synthetic resin products, among others. All of these are connected by keywords such as "reduction of environmental impact," "economic efficiency," "safety and security," and "maintenance and management." For example, in slope disaster prevention technology, while improving safety is a fundamental goal, we are also developing construction methods that have low environmental impact and are economically viable. Additionally, synthetic resin products possess the advantages of reducing environmental impact through recycling and excellent economic efficiency. In order to leave a slightly better living environment for the next generation, we aim to enhance our product offerings that seek harmony between the environment and society, contributing to the realization of a livable society now and in the future.
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