Joban Kosan Co.,Ltd. engages in the tourism, trading, manufacturing, and transportation businesses in Japan and internationally. It is involved in the operation of resort under the Spa Resort Hawaiians name; and Spa Resort Hawaiians golf course. The company also engages in the wholesale of imported coal; heavy oil, and LP gas; kerosene, gasoline, light oil, lubricating oil, and petrochemical products; wood pellets; and construction materials, such as cement, ready-mixed concrete, etc. In addition, it manufactures cast iron products, such as hydrostar motors that are used in the marine equipment and industrial machinery; and hydraulic motor body, as well as provides cargo transportation services. The company was founded in 1944 and is headquartered in Iwaki, Japan.