R.C. Core Co., Ltd. engages in the construction, sale and management of log houses. It operates through the following segments: Direct Sales, Dealer Sales, and Bess Partners (BP). The Direct Sales segment includes sales and contract construction of log house kit; brokerage and sale of real estate; and sale, management, maintenance, renovation works of vacation houses. The Dealer Sales segment sells log home kits through the company's BESS franchise. The BP segment involves in the construction and sale of log houses through BESS Partners. The company was founded by Akiko Tani and Kozo Futagi on August 26, 1985 and is headquartered in Tokyo, Japan.