Hoshi Iryo-Sanki Co., Ltd. engages in the manufacture and sale of pharmaceutical gases. It operates through the following segments: Pharmaceutical Gas, Home Care, Pharmaceutical Gas Equipment Works, Care & Welfare, Nursing Facilities, and Others. The Pharmaceutical Gas segment sells medical oxygen, anesthetic gas, and other general pharmaceutical gases. The Home Care segment leases and sells oxygen concentrator for residential oxygen treatment, constant positive pressure breathing treatment equipment, and home mechanical ventilation equipment. The Pharmaceutical Gas Equipment Works segment deals with the design, construction, inspection, and maintenance of pharmaceutical gas plumbing. The Care & Welfare segment handles nursing care-related goods, equipment rental, and home renovation. The Nursing Facilities segment operates nursing homes and day care facilities. The Others segment includes nursing school and medical equipment businesses. The company was founded in 1960 and is headquartered in Tokyo, Japan.