Wood One Co., Ltd. engages in the manufacture and sale of building materials and housing equipment. The company operates through the Housing Construction Materials and Equipment Business and the Power Generation Business segments. The Housing Construction Materials and Equipment Business segment offers timber structural materials for the home construction industry and interior supplies for the home and office such as floorings, wall panels, stairs, doors, and storage kitchen systems. This segment also involves forest management including tree-planting. The Power Generation Business segment engages in the biomass power generation and sales business. The company was founded by Isamu Nakamoto in May 1935 and is headquartered in Hatsukaichi, Japan.