• 2023

  Nippon Steel Trading Corporation was acquired and made into a subsidiary.

• 2022

  Muroran Works and East Nippon Works Kamaishi Area were reorganized to become North Nippon Works.

• 2021

  Mediumｰto Long-term Management Plan was formulated.

• 2020

  Merged with Nippon Steel Nisshin Co.,Ltd.
  Integration and Reorganization of Steelworks (a newly formed six-works structure)

• 2019

  Nippon Steel & Sumitomo Metal Corporation was renamed Nippon Steel Corporation.
  Sanyo Special Steel Co., Ltd. was acquired and made into a subsidiary.
  Nisshin Steel Co., Ltd. was made into a wholly owned subsidiary.

• 2017

  Nisshin Steel Co., Ltd. was acquired and made into a subsidiary.

• 2014

  Yawata Works and Kokura Works were integrated to become Yawata Works.
  Wakayama Works and Sakai Works were integrated to become Wakayama Works.
  Kimitsu Works and Tokyo Works were integrated to become Kimitsu Works.

• 2012

  Incorporated on October 1, integrating Nippon Steel Corporation and Sumitomo Metal Industries.

Nippon Steel Corporation

• 2011

  Agreed to commence consideration of business integration with Sumitomo Metal Industries, Ltd.
  

• 2006

  Engineering and construction business was spun off to Nippon Steel Engineering Co., Ltd.
  New materials business was spun off to Nippon Steel Materials Co., Ltd.

• 2003

  Stainless steel business was spun off to Nippon Steel & Sumikin Stainless Steel Corporation.

• 2002

  Announced alliances with Sumitomo Metal Industries, Ltd. and Kobe Steel, Ltd.
  All operations of Nippon Steel's Urban Development Division were integrated into Nippon Steel City Produce, Inc.

• 2001

  Operations of Nippon Steel's Electronics & Information Systems Division and its subsidiary.
  Nippon Steel Information & Communication Systems Inc. were integrated to organize NS Solutions Corporation.

• 2000

  Divisionally integrated operation system within the Nippon Steel Group based on product item or business area was introduced in the steelmaking and steel fabrication sector.

• 1997

  Silicon Wafer Division was organized (abolished in April 2004).

• 1993

  Semiconductor Division was organized (abolished in April 1999).

• 1991

  Technical Development Bureau was organized by integrating Central R&D Bureau and Plant Engineering & Technology Bureau, and R&E Center began operation.

• 1989

  Urban Development Division was organized.

• 1987

  Electronics & Information Systems Division, New Materials Division, and Service Business Division (integrated to Urban Development Division in June 1992) were organized.

• 1986

  Electronics Division was organized.

• 1984

  New Materials Projects Bureau was organized.
  Nippon Steel Chemical Co., Ltd. was inaugurated through the merger of Nippon Steel Chemical Co., and Nittetsu Chemical Industrial Co., Ltd.

• 1974

  Engineering Division Group was organized.

• 1971

  Nippon Steel absorbed Fuji Sanki Pipe & Tube Co., Ltd.
  Oita Works began operation.

• 1970

  Yawata Iron & Steel and Fuji Iron & Steel merged to form Nippon Steel Corporation.

• 1968

  Yawata Iron & Steel absorbed Yawata Steel Tube Co., Ltd.

• 1967

  Tokai Steel became Nagoya Works of Fuji Iron & Steel.

• 1965

  Kimitsu Works of Yawata Iron & Steel began operation.

• 1961

  Sakai Works of Yawata Iron & Steel began operation.

• 1958

  Tokai Iron & Steel Co., Ltd. was established.
  Yawata Iron & Steel inaugurated the Tobata Area of Yawata Works.

• 1955

  Hikari Works of Yawata Iron & Steel began operation.

• 1950

  Yawata Iron & Steel Co., Ltd. and Fuji Iron & Steel Co., Ltd. were established (Company’s founding).

Sumitomo Metal Industries, Ltd.

• 2012

  Merged with Sumitomo Metals (Kokura), Ltd. and Sumitomo Metals (Naoetsu), Ltd.

• 2011

  Agreed to commence consideration of business integration with Nippon Steel Corporation.

• 2008

  The titanium business was split and was absorbed by Sumitomo Metals (Naoetsu), Ltd.

• 2003

  The stainless business was split off and became Nippon Steel & Sumikin Stainless Steel Corporation.
  Wakayama Works' upstream operation was split off and became Sumikin Iron & Steel Corporation (Nippon Steel absorbed the company in 2018)

• 2002

  Announced alliances with Nippon Steel Corporation and Kobe Steel, Ltd. Silicon wafer business was transferred to Silicon United Manufacturing Corporation (present SUMCO Corporation).

• 2000

  Sumitomo Metals spun off its Kokura Works and Naoetsu Works and made them into Sumitomo Metals (Kokura), Ltd. and Sumitomo Metals (Naoetsu), Ltd. respectively.

• 1998

  Merged with Sumitomo Sitix Corporation.

• 1994

  Kashima Stainless Steel Works was integrated in Kashima Works.

• 1992

  Merged with Nippon Stainless Co., Ltd. (Naoetsu Works and Kashima Stainless Steel Works were established.)

• 1990

  Electronics Division was established.

• 1988

  Kainan Steel Tube Works was integrated in Wakayama Works.

• 1980

  Merged with Kainan Steel Tube Co., Ltd. (to form Kainan Steel Tube Works).

• 1977

  Engineering Division was established, marking entry into engineering business.

• 1974

  Hasaki Research Center, present Hasaki R&D Center, was established.

• 1968

  Kashima Works was established.

• 1966

  Kainan Steel Tube Co., Ltd. was established.

• 1963

  Sumitomo Special Metals Co., Ltd. (former Magnetic Steel and Electronic Parts Manufacturing Departments) was established.

• 1961

  Sumitomo Precision Products Co., Ltd. (former Aircraft Instruments Department) was established.

• 1959

  Sumitomo Light Metal Industries, Ltd. (former Copper Rolling and Aluminum Rolling Department) was established.
  Central Research Laboratories, present Amagasaki R&D Center, was established.

• 1953

  Merged with Kokura Steel Manufacturing Co. and established Kokura Works, an integrated steelmaker.

• 1952

  Shin-Fuso Metal Industries, Ltd. was renamed Sumitomo Metal Industries, Ltd.

• 1950

  Narumi China Corporation (former China Manufacturing Department) was established

• 1949

  Shin-Fuso Metal Industries, Ltd. was established (Company’s founding).