Chronology
| 2022 | Muroran Works and East Nippon Works Kamaishi Area were reorganized to become North Nippon Works. |
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| 2020 | Merged with Nippon Steel Nisshin Co.,Ltd. Steelworks are integrated and reorganized as six steelworks,namely the Muroran, East Nippon, Nagoya, Kansai, Setouchi and Kyusyu Works. |
| 2019 |
Nippon Steel & Sumitomo Metal Corporation was renamed Nippon Steel Corporation. |
| 2012 | Incorporated on October 1, integrating Nippon Steel Corporation and Sumitomo Metal Industries. |
Nippon Steel
| 2011 | Agreed to commence consideration of business integration with Sumitomo Metal Industries, Ltd. |
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| 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., Ltd. 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 Metals
| 2012 | Merged with Sumitomo Metals (Kokura), Ltd. and Sumitomo Metals (Naoetsu), Ltd. |
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| 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. |
| 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). |
NIPPON STEEL NISSHIN
| 2019 | Became a wholly-owned subsidiary of Nippon Steel & Sumitomo Metal Corporation Stainless steel sheet business separated Renamed “NIPPON STEEL NISSHIN CO. LTD.” |
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| 2017 | NIPPON STEEL NISSHIN became a member of Nippon Steel & Sumitomo Metal Group |
| 2016 | NIPPON STEEL NISSHIN A&C Co., Ltd. established, through merger of the Company’s coating and building materials businesses including the Ichikawa Works and the businesses of Nisshin A&C Co., Ltd. |
| 2014 | "NIPPON STEEL NISSHIN Holdings, NIPPON STEEL NISSHIN and Nippon Metal Industry completed tripartite merger to start business under new trade name of Nisshin Steel Co.,Ltd. Nisshin Steel Stainless Steel Tubing Co., Ltd. inaugurated through consolidation of Amagasaki Works and Nippon Metal Tube Co.,Ltd." |
| 2012 | NIPPON STEEL NISSHIN Holdings Co.,Ltd. established through business integration of Nisshin and Nippon Metal Industry |
| 2011 | Baru Stainless SDN.BHD. started commercial production |
| 2009 | Nisshins F-Tech.Plaza established |
| 2000 | Nisshins Toyo Works completed |
| 1999 | “ZAM®”, highly corrosion resistant hot-dip coated steel sheet launched on the market |
| 1998 | Ningbo Baoxin Stainless Steel Co., Ltd.in China started commercial production |
| 1988 | Wheeling-Nissin, Inc. in the U.S. started commercial production |
| 1985 | Nisshins Amagasaki plant renamed Amagasaki Works to specialize in stainless steel pipes & tubes |
| 1972 | Nippon Metal Industrys Kinuura Works started operation |
| 1970 | “ALSTAR” released Nisshin invested in Acerinox, S.A.,Spanish-Japanese stainless steel joint venture. Relevant technical assistance started |
| 1969 | Tandem Sendzimir mill started |
| 1966 | Nisshin obtained business right from Kobe Steel, Ltd. to operate the Sakai Works |
| 1965 | “Gas Wiping (YG) Process”, our epoch-making development to attain uniform coating weights introduced |
| 1963 | Nisshin’s Ichikawa Works completed Three plants of Nanyo, Tokuyama, and Tonda consolidated and inaugurated as Shunan Plant (present Shunan Works) “PAINTITE” released |
| 1962 | Nisshin installed and blew in its first blast-furnace at Kure Works to start integrated steelmaking |
| 1960 | Nippon Metal Industrys Sagamihara Works built |
| 1959 | “NIPPON STEEL NISSHIN Co., Ltd.” founded through merger of Nichia Steel Co.,Ltd. and Nihon Teppan Co., Ltd. |
| 1934 | Industrialization of 18% chromium-8% nickel stainless steel achieved |
| 1932 | “Nippon Metal Industry Co.,Ltd.” founded |
| 1911 | “Aento Co., Ltd ” founded → 1953 Renamed “Nihon Teppan Co., Ltd.” |
| 1908 | “Tanaka Galvanizing Works” founded → 1939 Renamed “Nichia Steel Co.,Ltd.” |