- Business
- Gecoss Corporation engages primarily in the leasing and sale of temporary steel materials and construction machinery for large-scale civil engineering and construction projects in Japan. The company operates through two main segments: the Temporary Steel segment, which leases and sells H-shaped steel, steel sheet piles, steel earth-retaining materials, road deck panels, steel floor plates, and specially machined products such as steel segments and H-shaped supports; and the Construction Machinery segment, which leases aerial work platforms, backhoes, generators, temporary houses, lights, and other equipment through its consolidated subsidiary RENTALSYSTEM Company, Limited. Gecoss also designs, manufactures, and constructs temporary bridges, station building platforms, stairs, shield mounts, road bridges, and bridge collapse prevention hardware; undertakes pile punching work, mountain retaining erection and demolition, soil cement column wall construction, and obstacle removal; and provides planning, design, technical support, installation, and repair services for temporary construction works. Founded in 1968 and headquartered in Bunkyo-ku, Tokyo, the company employs 1,379 people and serves urban redevelopment, underground construction, and infrastructure projects as a subsidiary of JFE Steel Corporation. In September 2025, Gecoss, together with RENTALSYSTEM and Mizuho Leasing Company, Limited, entered a capital and business alliance, under which Mizuho Leasing acquired approximately 49% of RENTALSYSTEM's shares via third-party allotment, making it Gecoss's consolidated subsidiary and Mizuho Leasing's equity-method affiliate to expand product offerings, customer base, and new business fields; this builds on their initial April 2024 alliance focused on optimizing RENTALSYSTEM's rental assets and enhancing construction machinery operations.