One Step Develops Inflatable Rapid Water Storage Tank for Firefighting, Available from May 15, 2026

One Step Co., Ltd.'s Air Disaster Prevention Division, which develops, sells, and rents products for disaster prevention, disaster mitigation, and safety management, has developed a new “Inflatable Rapid Water Storage Tank for Firefighting” that enables quick securing of water sources at disaster sites and during firefighting operations. The product will be available from May 15, 2026. The new product improves on a conventional model that has been adopted by the Yokohama City Fire Bureau, newly incorporating a robust drop-stitch structure. It is a next-generation relay water tank for firefighting that combines the ease of an inflatable product with rigidity comparable to a hard case and expanded capacity. It can be set up faster than previous models, improving mobility at firefighting sites where every second counts. Development Background: Securing Water Sources in Narrow Areas and Forest Fires In increasingly frequent large-scale fires, securing and relaying water is a critical issue in densely packed residential areas and forested regions where fire trucks have difficulty entering. Relay tanks that temporarily store water near the scene must provide maximum capacity in limited spaces while allowing fast transport and installation. Three Key Features of the New Product While retaining the convenience of an inflatable design, the product adopts an innovative structure that maximizes on-site usability and durability, based on demonstrations with fire departments and interviews with firefighting professionals. 1. High Rigidity Through a Drop-Stitch Structure The tank uses a drop-stitch structure in which the inner walls are connected by tens of thousands of special polyester threads. When inflated, the PVC tank becomes as hard and strong as a board. 2. A Perfect Square Shape That Eliminates Dead Space Because the drop-stitch structure allows the walls to stand vertically, the tank maintains a perfect square shape. The wall thickness has been reduced from the conventional 50 cm to 30 cm. As a result, while keeping the same installation footprint of 3 m × 3 m, the internal dimensions have been greatly expanded from 2 m × 2 m to 2.4 m × 2.4 m. 3. Faster Setup and Removal with Compact Storage Structural optimization has shortened the inflation setup time compared with the conventional model. Once deflated, the tank becomes completely flat and can be folded into an extremely compact size. During storage, it does not take up excessive limited cargo space in fire trucks or transport vehicles. It can be quickly deployed and removed by one or two people, substantially reducing manpower requirements at urgent disaster sites. Reference Video: Setup Speed of the Drop-Stitch Structure The reference video shows the setup of an inflatable pool using the same drop-stitch structure as this product. It demonstrates how the product stands on its own and achieves high rigidity shortly after inflation. Reference: Conventional Model The conventional tank on which this product is based has been adopted by the Yokohama City Fire Bureau and other organizations for disaster prevention drills and preparation for real disasters. Depending on site usage and installation space, the company proposes the optimal solution from either the new product or the conventional model. Pricing The product is available for both purchase and rental according to customer needs. Pricing will be provided based on the usage period and installation environment via each product page or the inquiry form. About One Step Co., Ltd.'s Air Disaster Prevention Division One Step's Air Disaster Prevention Division was established in 2020 during the COVID-19 pandemic. It began by developing and commercializing an inflatable simple negative-pressure room for isolating people infected with COVID-19 and supplying it to medical institutions. Since then, the division has expanded its lineup of disaster prevention and safety products using air-forming technology. The company's products are lightweight, compact to store, and quick to deploy when needed. At disaster and emergency response sites, they provide speed and flexibility that conventional materials cannot achieve. Even when non-standard sizes are required, the company can manufacture and deliver custom products at low cost and with short lead times. The mission of the Air Disaster Prevention Division is to continue working closely with customers' on-site challenges and solve requests such as, “Can you make something like this?” Company Overview Company name: One Step Co., Ltd. Head office: 4625-1 Ko Imaizumi, Kiyotake-cho, Miyazaki City, Miyazaki Prefecture, Japan Representative Director: Hiroyuki Yamamoto Business: Development, sales, and rental of disaster prevention, disaster mitigation, safety management, and water storage tools Established: June 2002 Website: https://ai-bosai.com/ Office Locations Head office: 4625-1 Ko Imaizumi, Kiyotake-cho, Miyazaki City, Miyazaki Prefecture Kansai Branch: 1283 Shinzaike, Aboshi-ku, Himeji City, Hyogo Prefecture Tokai Branch: 531 Shimoe-cho, Chuo-ku, Hamamatsu City, Shizuoka Prefecture Kanto Branch: 765-1 Okusa-cho, Wakaba-ku, Chiba City, Chiba Prefecture Contact / Media Inquiries One Step Co., Ltd. TEL: 0985-64-5399, Miyazaki Head Office Email: air@onestep-miyazaki.com Inquiry form: https://ai-bosai.com/contact/#/