Tamai Steamship Co., Ltd. engages in the shipping business. It operates through the following segments: Ocean Going Tramp, Coastal, and Real Estate Leasing. The Ocean Going Tramp segment transports aluminum hydroxide, grains, slag, and cement clinker. It also offers short-term charter vessels. The Coastal segment provides regular charter boats. It also deals in seafarer dispatch. The Real Estate Leasing segment manages real estate for rent. The company was founded by Shukichi Tamai on May 31, 1929 and is headquartered in Tokyo, Japan.