Hamai Industries Ltd. manufactures and sells precision machine equipment, valves, and high-pressure gas related equipment in Japan. It also offers LPG cylinder valves; ball valves for factories, construction machinery, food machinery, water treatment equipment, and semiconductor manufacturing equipment; natural gas automotive valves; medical gas valves; and high- pressure gas valves, as well as valves for hydrogen fuel cell vehicles, and fire extinguishers and fire extinguishing equipment. In addition, the company leases real estate properties. The company was formerly known as Hamai Factory Limited and changed its name to Hamai Industries Ltd. in April 1991. Hamai Industries Ltd. was founded in 1927 and is headquartered in Tokyo, Japan.