Hamai’s growth has been as the top Japanese manufacturer of LP gas valves. We were the first in the industry to research and develop valves for hydrogen fuel cells, and we are pressing forward to achieve a sustainable future society

Hamai was established in 1927. Since then, we have grown as the manufacturer of LP gas valves holding the top share in Japan. We have manufactured and developed valves in response to the needs of the times — high-pressure valves and various ball valves — and in clean energy, we have successfully developed high-performance hydrogen valves. As a leading hydrogen valve manufacturer of Japan, we utilize our original research and development capability, and as a mass producer of valves, we are pressing forward to achieve a sustainable future society.

History

February 1927	Sakae Hamai founded the private company Hamai manufacturing Seisakusho to manufacture gas cutting equipment.
August 1953	The company started manufacturing valves for propane gas cylinders.
October 1958	The general partnership company was incorporated to establish Hamai Manufacturing Co., Ltd.
November 1960	The new Fuchu Plant was constructed in Fuchu City, Tokyo Prefecture.
June 1972	The company’s shares were registered with the Japan Securities Dealers Association for over-the-counter trading.
May 1974	The new Otaki Plant was constructed in Otaki Town , Isumi County, Chiba Prefecture, and it started its manufacture of line ball valves.
April 1991	The company was renamed Hamai Industries Limited.
August 2002	A project was started with the focus of developing valves for hydrogen fuel cells.
December 2004	The company's shares were listed on the JASDAQ Securities Exchange.
October 2005	The production of valves for LP gas cylinders reached a total of 200 million units.
February 2013	The company established Hamai Korea Co., Ltd. (a wholly owned company) in South Korea.
July 2013	The company’s shares became listed on the Tokyo Stock Exchange (JASDAQ market) because of the combination of Tokyo Stock Exchange, Inc. and Osaka Exchange, Inc.