Toho Acetylene Co., Ltd.

Toho Acetylene Co., Ltd. is a Japanese company engaged in the manufacture and sale of industrial gases. It was established in March 1955 in Sakata, Yamagata Prefecture, where it also opened the Sakata Plant and began producing dissolved acetylene, welding materials, and welding and cutting equipment. The company is headquartered in Tagajo, Miyagi Prefecture, and is listed on the Tokyo Stock Exchange Standard Market. It is an equity-method affiliate of Tosoh. The company's core business is the production and sale of industrial high-pressure gases such as acetylene, oxygen, and nitrogen, as well as gases for food applications. It also supplies liquefied petroleum gas (LP gas) and petroleum products. Its operations are concentrated mainly in the Tohoku region of northern Japan, supported by a network of affiliated companies across the region. Toho Acetylene has a long history on the Tokyo Stock Exchange, having first listed on the Second Section in September 1961. After a merger with Akita Denka Kogyo Co., Ltd. in December 1963, its listing was temporarily cancelled, but it was relisted on the Second Section in January 1964. In June 2017 it moved to the First Section, and in December 2025 it is scheduled to move to the Standard Market following the exchange's restructuring. The company has expanded through capital participation in related firms, including Toho Yozai (later Toho) in 1963 and Tagawa Co., Ltd. in 1999. In September 2020 it agreed with Taiyo Nippon Sanso to integrate their gas filling stations in Tagajo City. Its registered head office was moved from Chuo Ward, Tokyo, to Tagajo, Miyagi in June 2014, while its sales headquarters had already moved to Aoba Ward, Sendai in April 2008.

Toho Acetylene Co., Ltd. was established in March 1955 in Sakata, Yamagata Prefecture. At the same time, it opened the Sakata Plant and began manufacturing dissolved acetylene, welding materials, and welding and cutting equipment. In March 1958, the company started selling propane gas, kerosene, and household-related appliances. In November 1958, its registered head office was moved from Sakata to Chuo Ward, Tokyo. In April 1959, it established the Sendai Plant in Tagajo, Miyagi Prefecture. In September 1961, the company listed on the Second Section of the Tokyo Stock Exchange. In January 1963, it acquired a capital stake in Toho Yozai (later Toho). In December 1963, it was absorbed by Akita Denka Kogyo Co., Ltd., and its listing on the Second Section was cancelled at the same time. In January 1964, it was relisted on the Second Section. In March 1999, it acquired a capital stake in Tagawa Co., Ltd. In April 2008, its sales headquarters was moved to Aoba Ward, Sendai. In June 2014, its registered head office was moved from Chuo Ward, Tokyo, to Tagajo, Miyagi. In June 2017, it changed its market to the First Section of the Tokyo Stock Exchange. In September 2020, it agreed with Taiyo Nippon Sanso to integrate their gas filling stations in Tagajo City. In December 2025, it is scheduled to change its market to the Standard Market of the Tokyo Stock Exchange.

• 2025

  Scheduled to change market to the Standard Market of the Tokyo Stock Exchange.

• 2020

  Agreed with Taiyo Nippon Sanso to integrate gas filling stations in Tagajo City.

• 2017

  Market changed to the First Section of the Tokyo Stock Exchange.

• 2014

  Registered head office moved from Chuo Ward, Tokyo, to Tagajo, Miyagi.

• 2008

  Sales headquarters moved to Aoba Ward, Sendai.

• 1999

  Acquired capital stake in Tagawa Co., Ltd.

• 1964

  Relisted on the Second Section of the Tokyo Stock Exchange.

• 1963

  Acquired capital stake in Toho Yozai (later Toho).

• 1963

  Absorbed by Akita Denka Kogyo Co., Ltd.; delisted from the Second Section.

• 1961

  Listed on the Second Section of the Tokyo Stock Exchange.

• 1959

  Sendai Plant established in Tagajo, Miyagi.

• 1958

  Began selling propane gas, kerosene, and household-related appliances.

• 1958

  Registered head office moved from Sakata to Chuo Ward, Tokyo.

• 1955

  Established in Sakata, Yamagata; Sakata Plant opened; began manufacturing dissolved acetylene, welding materials, and welding/cutting equipment.

Regional industrial gas supplier in Japan's Tohoku region, affiliated with Tosoh.

• Dissolved acetylene

• Oxygen

• Nitrogen

• Industrial high-pressure gases

• Food gases

• LP gas

• Petroleum products

• Welding materials

• Welding and cutting equipment

1. 1東邦アセチレン - Wikipediaja.wikipedia.org
2. 2Toho Acetylene - Wikidatawikidata.org
3. 3東邦アセチレン株式会社toho-ace.co.jp