Yamadai Corporation engages in the wholesale and retail of housing materials and construction materials in Japan. It is also involved in the wood processing business, which includes computer cutting of wood, antiseptic processing, artificial drying processing, lumbering, etc.; afforestation and cultivation of sugi and cypress; sale and brokerage of residential construction, large wooden construction, condominiums, and real estate properties; ground survey business; and real estate rental business. The company was incorporated in 1964 and is headquartered in Ishinomaki, Japan.