History

	1895	Koroku Hirose founded Hirose Trading in Osaka specializing in sales of mineral oil and Shimizu-style rice hullers
	1906	Hirose Trading started dealing byproducts (tar, pitch) of city gas production for use as road pavement materials which was produced by Osaka Gas Co., Ltd. (Now Osaka Gas Co., Ltd.)
	1930	Started selling tar and pitch to Kokusan Hiryo KK
July	1931	Kansai Carbide Sales Co., Ltd. established, with Hirose Trading taking part  Koroku Hirose II) and Takashi Ueda spin off a new business from Hirose Trading, dedicated to sales of carbide for melt-cutting
November	1937	Koroku Hirose II jointly established Sanwa Trading within the Osaka branch of Mitsui & Co., Ltd. under joint investment (capital of 3,000 yen) with Shinichi Hayashi , Takeo Yamada and Takashi Ueda.  In 1938, the headquarters was moved to Osaka
November	1946	Started selling high pressure gases
April	1948	Sanwa Trading undertakes personnel associated with carbide companies that were closed after World warⅡ, and was reorganized as Sanwa Trading Co., Ltd.
September	1951	Established the Ogaki Branch.
July	1954	Invested to Shinwa Gas Souchi Co., Ltd.
August	1954	Started distribution of a gas cutting equipment of Tanaka Engineering Works Ltd. (Now Nissan Tanaka Corporation)
July	1959	Did capital investment to Ibigawa Acetylene Co., Ltd. (Now IBIDEN CHEMICAL Co., LTD)
September	1960	Started dealing carbon gouging rods produced by Ibigawa Denki Kogyo Co., Ltd.(Now IBIDEN CO., LTD.)
May	1965	Started On-site acetylene gas plant #1 (our system) at Hitachi Zosen Corporation Innoshima Plant. Established the Hiroshima branch.
April	1967	Started welding material sales transferred from Osaka Sanso Kogyo Co., Ltd. (Now  Air Liquide Japan Ltd.)
April	1971	Established the Tokyo branch.
February	1973	Started dealing printed circuit boards produced by Ibigawa Electric Industry Co., Ltd. (Now IBIDEN Co., Ltd.)
August	1973	Started on-site acetylene gas plant at  Hitachi Zosen Corporation Ariake Plant; established the Ariake Branch
July	1974	Started dealing ceramic fibers produced by Ibigawa Denki Kogyo Co., Ltd.(Now IBIDEN CO., LTD.)
October	1981	Increased capital to 50 million yen
June	1986	Moved the headquarters to 1-10 Shinmachi, Nishi-ku, Osaka
November	1986	Established Kashima blanch.
July	1991	Celebrated the 60th anniversary and name changed to SAS SANWA Co., Ltd.
November	1994	Established RENAISSANCE SAS SANWA LIMTED, Hong Kong
July	1997	Donated a replica of Terracotta Warriors(Praying for recovery from The Great Hanshin Earthquake) to the Kobe Oji Zoo and received a letter of appreciation from the mayor of Kobe.
March	2006	Moved the headquarters to its present location (1-4-12 Itachibori, Nishi-ku, Osaka-shi)
March	2007	Moved the Tokyo Branch to its present location (5-9-10 Shiba, Minato-ku, Tokyo)
June	2007	Acquired Bicycle Racks equipment business from Yokohama YK Pvt. Ltd.
November	2007	Certified ISO9001 and 14001 (JQA-QMA13435, JQA-EM5963)
March	2008	Established the Ogaki Branch at 5-7 Motoima, Ogaki-shi, Gifu.
July	2011	Established the Northern Japan Sales Office in Sendai-shi, Miyagi.
September	2014	Established SAS SANWA India Private Limited in Gurugram, India  Established gas tanks for ISGEC Hitachi Zosen and started supplying gases (O2, Ar, Co2)
July	2021	90th anniversary of the company's founding
April	2024	Changed company name from Shinwa Gas Souchi Co., Ltd. to Shinwa Engineering Co., Ltd.
May	2024	Moved the headquarters to its present location (1-4-4 Awaza, Nishi-ku, Osaka-shi)

* Kashima Branch & Sendai Branch are merged Tokyo Branch.