History
1944 Nov.
- Established by Asaji Inoue, Representative Director, in Mikunino-mura, Shikama-gun, Hyogo Pref. (currently Himeji City), as a subcontracting factory in the Himeji district, of Kawanishi Aircraft Co., Ltd.
1945 Aug.
- Switched the operation over to the manufacture, and repair of trackwork materials for supply to the Japanese National Railways and private railways.
1958 Sep.
- The production of steel castings was started at the Nibuno plant.
1959 Nov.
- A 15-ton Heroult electric arc furnace was built inhouse at the Nibuno plant.
1960 Apr.
- Construction of a large-size rolling mill at the Nibuno plant was completed.Thus, the company became the only maker of trackwork materials in Japan to operate on a "through" basis-from production of steel ingots to rolling of steel materials and fabrication of final products.
1961 Dec.
- A 40-ton electric arc furnace went into operation at the Aboshi plant.
1962 Mar.
- Established Yamato Shoji Co., Ltd.
1962 Sep.
- Shares listed in the First Section of the Tokyo and Osaka Stock Exchange.
1962 Sep.
- The Steel Frame and Bridge Construction Dept. (heavy industries dept.) was established at the main plant.
1966 Nov.
- The Nibuno and Ichikawa plants were moved to the site of the main plant to concentrate operations.
1969 Nov.
- The Heavy-duty Machining Dept. was newly established and went into operation.
1973 Jun.
- The No.1 continuous casting machine went into operation.
1973 Aug.
- A 50-ton electric arc furnace went into operation.
1975 Nov.
- A universal mill went into operation.
1978 Mar.
- No.2 continuous casting machine went into operation.
1987 Feb.
- Established Nucor-Yamato Steel Co., Ltd joint venture in America.
1989 Sep.
- Established Arkansas Steel Associates LLC joint venture in America.
1991 Oct.
- Four strand beam blank/bloom combination type continuous casting machines started operations (upgrade of the No.1 and No.2 casting machines).
1992 Apr.
- Established Siam Yamato Steel Co., Ltd joint venture in Thailand.
1996 Apr.
- Started use of 130-ton direct current electric arc furnace (upgrade of the 40-ton and 50-ton electric arc furnaces).
2002 Apr.
- The trackwork materials department was separated and Yamato Trackwork System Co., Ltd was established.
2002 Nov.
- Established Yamato Korea Steel Corporation (currently YK Steel Corporation) in Korea.
2003 Oct.
- The steel and heavy industry departments were spun off and Yamato Steel Co., Ltd. was established. Yamato Kogyo Co., Ltd was converted to a holding company.
2009 Feb.
- Established United Steel Company (SULB) (currently SULB Company BSC(c)) in Bahrain.
2010 Mar.
- The second plant began operations at Siam Yamato Steel Co., Ltd.
2011 Jun.
- Established United SULB Company (Saudi Sulb) LLC in Saudi Arabia.
2020 Mar.
- Established POSCO YAMATO VINA STEEL JOINT STOCK COMPANY in Vietnam.
2022 Apr.
- Shifted from the First Section to the Prime Market in accordance with the reorganization of the market segmentation of the Tokyo Stock Exchange.
2024 May
- Established PT Garuda Yamato Steel in Indonesia.