History

Nov. 1944

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.

Aug. 1945

Switched the operation over to the manufacture, and repair of trackwork materials for supply to the Japanese National Railways and private railways.

Sep. 1958

The production of steel castings was started at the Nibuno plant.

Nov. 1959

A 15-ton Heroult electric arc furnace was built inhouse at the Nibuno plant.

Apr. 1960

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.

Dec. 1961

A 40-ton electric arc furnace went into operation at the Aboshi plant.

Mar.1962

Established Yamato Shoji Co., Ltd.

Sep. 1962

Shares listed in the First Section of the Tokyo and Osaka Stock Exchange.

Sep.1962

The Steel Frame and Bridge Construction Dept. (heavy industries dept.) was established at the main plant.

Nov. 1966

The Nibuno and Ichikawa plants were moved to the site of the main plant to concentrate operations.

Nov. 1969

The Heavy-duty Machining Dept. was newly established and went into operation.

Jun. 1973

The No.1 continuous casting machine went into operation.

Aug. 1973

A 50-ton electric arc furnace went into operation.

Nov. 1975

A universal mill went into operation.

Mar. 1978

No.2 continuous casting machine went into operation.

Feb. 1987

Established Nucor-Yamato Steel Co., Ltd joint venture in America.

Sep. 1989

Established Arkansas Steel Associates LLC joint venture in America.

Oct. 1991

Four strand beam blank/bloom combination type continuous casting machines started operations (upgrade of the No.1 and No.2 casting machines).

Apr. 1992

Established Siam Yamato Steel Co., Ltd joint venture in Thailand.

Apr. 1996

Started use of 130-ton direct current electric arc furnace (upgrade of the 40-ton and 50-ton electric arc furnaces).

Apr. 2002

The trackwork materials department was separated and Yamato Trackwork System Co., Ltd was established.

Nov. 2002

Established Yamato Korea Steel Corporation (currently YK Steel Corporation) in Korea.

Oct. 2003

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.

Feb. 2009

Established United Steel Company (SULB) (currently SULB Company BSC(c)) in Bahrain.

Mar. 2010

The second plant began operations at Siam Yamato Steel Co., Ltd.

Jun. 2011

Established United SULB Company (Saudi Sulb) LLC in Saudi Arabia.

Mar. 2020

Established POSCO YAMATO VINA STEEL JOINT STOCK COMPANY in Vietnam.

Apr. 2022

Shifted from the First Section to the Prime Market in accordance with the reorganization of the market segmentation of the Tokyo Stock Exchange.

May 2024

Established PT Garuda Yamato Steel in Indonesia.

Nov. 2025

Established And Yamato Co., Ltd. (April 2026: Certified as a special subsidiary).

Feb. 2026

Invested in Salix Products Pty Ltd. in Australia.

Feb. 2026

Transferred all the shares in the Middle East business and ceased business operations in the region.