Mitsui Home Co., Ltd. (Headquarters: Koto-ku, Tokyo; President and CEO: Hidetoshi Nojima; hereinafter "the Company") announces that its regional operating subsidiary, Mitsui Home Hokkaido Co., Ltd. (Headquarters: Kita-ku, Sapporo, Hokkaido; President and CEO: Kiyoshi Ito; hereinafter "Mitsui Home Hokkaido"), has completed the construction of five wooden koban (police boxes) across Hokkaido. This project involved building five new wooden koban in Sapporo City and Eniwa City. This marks the first time the Mitsui Home Group has constructed and completed wooden koban. By using cross-laminated timber (CLT) for the structural framework and adopting box-type units pre-assembled in a factory, the project achieved high-quality, efficient construction while prioritizing safety and environmental considerations—establishing police boxes as reliable hubs for community safety and security. Additionally, through the active use of locally sourced building materials from Hokkaido, the project contributes to building a sustainable local society. Key Features of the Project ● First wooden koban construction by the Mitsui Home Group ● Achieved safety and environmental performance through CLT structural elements and factory-assembled box-type units ● Contributes to regional revitalization through active use of local materials and collaboration with local companies ● Contributes to a decarbonized society through improved thermal insulation performance and carbon storage inherent in wooden construction Genmachi Koban Asahikawa Koban Hokuto Koban Kitano Koban Megumino Koban Construction began in late December 2025 and all five buildings were completed by May 2026. Since its founding, the Company has contributed to enriched living and sustainable societies through housing that makes full use of wood. Going forward, Mitsui Home will continue to explore the potential of wood, promoting wooden construction for medium- to large-scale buildings to contribute further to a decarbonized society. Ac