Hoshi Iryou-Sanki Co., Ltd.. The Group's principal activity is planning, manufacture and sale of medical gases such as oxygen and nitrogen and gas related products. The Group's activities also includes rental and leasing of medical equipments such as oxygen generators for home-use and related gas plumbing works. Medical gases accounted for 58% of fiscal 2002 revenues; home-use gas related equipment rental, 24%; gas plumbing works and maintenance, 11%; gas-related sundry goods, 7%.