| 1904-04 |
In 1904 (Meiji 37), Tokyo Spring Manufacturing, the oldest spring manufacturer in Japan, founded in 1904, merged with Tokyo Steel Works, founded in 1916 (Taisho 5), to establish Tokyo Steel Co., Ltd. |
| 1917 |
Although the specific founding year is not recorded, it is documented that Tokyo Steel Co., Ltd. was established in 1917. |
| 1917 |
Establishment |
| 1917-04 |
The oldest spring manufacturer in Japan, Tokyo Spring Manufacturing Co., Ltd., founded in 1904 (Meiji 37), merged with Tokyo Steel Materials Manufacturing Co., Ltd., founded in 1916 (Taisho 5), to establish Tokyo Steel Materials Co., Ltd. |
| 1919-05 |
In May of the 8th year of Taisho (1919), began manufacturing cast and forged steel products as Mitsubishi Shipbuilding Co., Ltd., Nagasaki Steel Works. |
| 1919-05 |
Started manufacturing cast and forged steel products as Mitsubishi Shipbuilding Co., Ltd., Nagasaki Steel Works. |
| 1924-05 |
In May of the 13th year of Taisho (1924), acquired Hirota Steel Works and started steelmaking operations. |
| 1924-05 |
Acquired Hirota Steel Works and began steelmaking operations. |
| 1934-04 |
In April of the 9th year of Showa (1934), renamed to Mitsubishi Heavy Industries, Ltd. |
| 1934-04 |
Renamed to Mitsubishi Heavy Industries, Ltd. |
| 1937-04 |
In April of the 12th year of Showa (1937), became independent from Nagasaki Shipyard as Mitsubishi Heavy Industries, Ltd., Nagasaki Steel Works. |
| 1937-04 |
Separated from Nagasaki Shipyard and became Mitsubishi Heavy Industries, Ltd., Nagasaki Steel Works. |
| 1940-12 |
In December of the 15th year of Showa (1940), renamed to Mitsubishi Steel Co., Ltd. |
| 1940-12 |
Renamed to Mitsubishi Steel Co., Ltd. |
| 1941-08 |
In August of the 16th year of Showa (1941), established Fukagawa Steel Works. |
| 1941-08 |
Established Fukagawa Steel Works. |
| 1942-08 |
In August of the 17th year of Showa (1942), established Mitsubishi Steel Co., Ltd., inheriting the business of Mitsubishi Heavy Industries, Ltd., Nagasaki Steel Works. |
| 1942-08 |
Established Mitsubishi Steel Co., Ltd., inheriting the business of Mitsubishi Heavy Industries, Ltd., Nagasaki Steel Works. |
| 1942-12 |
Merged with the other company in December Showa 17 to form Mitsubishi Steel Corporation. |
| 1942-12 |
Merged the two companies to form Mitsubishi Steel Co., Ltd. |
| 1949-12 |
In December Showa 24, based on a decision under the Corporate Reorganization Law, two companies were established: Nagasaki Steel Co., Ltd. and Tokyo Steel Co., Ltd. Nagasaki Steel Co. inherited the business of Nagasaki Steel Works, and Tokyo Steel Co., Ltd. inherited the businesses of Oshima Manufacturing Plant, Fukagawa Steel Works, and Hirota Steel Works. |
| 1949-12 |
Based on the decision and maintenance plan under the Corporate Reorganization Act, established Nagasaki Steel Co., Ltd. and Tokyo Steel Materials Co., Ltd. as second companies. The former Nagasaki Steel Co., Ltd. and Tokyo Steel Materials Co., Ltd. |
| 1949-12 |
Nagasaki Steel Co., Ltd. inherited the business of Nagasaki Steel Works. Tokyo Steel Materials Co., Ltd. inherited the businesses of Oshima Manufacturing, Fukagawa Steel Works, and Hirota Steel Works. Top left: Oshima Manufacturing (Head Office) Top right: Fukagawa Steel Works Bottom left: Hirota Steel Works Top: Oshima Manufacturing (Head Office) Middle: Fukagawa Steel Works Bottom: Hirota Steel Works |
| 1952-12 |
In December Showa 27, the company name was changed to Mitsubishi Steel Materials Co., Ltd. |
| 1952-12 |
Renamed to Mitsubishi Steel Materials Co., Ltd. |
| 1953-06 |
In June Showa 28, the company name was changed to Mitsubishi Steel Corporation. |
| 1953-06 |
Renamed to Mitsubishi Steel Co., Ltd. |
| 1963-09 |
In September Showa 38, Utsunomiya Manufacturing Plant was newly established. |
| 1963-09 |
Established Utsunomiya Manufacturing Plant. |
| 1964-02 |
In February Showa 39, the two companies merged to form Mitsubishi Steel Corporation. |
| 1964-02 |
The two companies merged to become Mitsubishi Steel Corporation. Mitsubishi Steel Corporation |
| 1965-04 |
In April Showa 40, Oshima Manufacturing Plant and Fukagawa Steel Works were integrated to establish Tokyo Manufacturing Plant. |
| 1965-04 |
Integrated Oshima Manufacturing Plant and Fukagawa Steel Works to establish Tokyo Manufacturing Plant. |
| 1967-05 |
In May Showa 42, Ichikawa Manufacturing Plant was newly established, relocating the magnetic material division of Oshima Manufacturing Plant. |
| 1967-05 |
Established Ichikawa Manufacturing Plant and relocated the magnetic materials division of Oshima Manufacturing Plant. |
| 1970-04 |
In April Showa 45, the company, along with Nippon Steel Corporation and others, participated in capital and established Japan Foundry & Forging Co., Ltd. |
| 1970-04 |
Founded Nippon Cast Steel Co., Ltd., mainly through capital participation from our company and Nippon Steel & Sumitomo Metal Corporation (renamed to Nippon Steel & Sumitomo Metal Corporation in 2012), aiming to manufacture and process large forged steel products. |
| 1975-01 |
In January Showa 50, the business related to machinery assembly at Nagasaki Manufacturing Plant was separated, and Mitsubishi Nagasaki Machinery Co., Ltd. was established. |
| 1975-01 |
Separated the machinery assembly business of Nagasaki Manufacturing Plant (formerly Nagasaki Steel Works) and established Mitsubishi Nagasaki Machinery Co., Ltd. with joint investment from Mitsubishi Heavy Industries Ltd., Mitsubishi Bank Ltd., and four other Mitsubishi-affiliated companies. |
| 1978-05 |
In May Showa 53, Ichikawa Spring Factory was newly established. |
| 1978-05 |
Newly established Ichikawa Spring Factory. |
| 1983-02 |
In February Showa 58, Ishikawa Steel Casting Co., Ltd. was established with the business purpose of manufacturing and processing cast steel products. |
| 1983-02 |
Established Rishoko Casting Co., Ltd., which aims to manufacture and process cast steel products. |
| 1986-07 |
In July Showa 61, a joint venture with Rockwell International Corporation of the United States was established in Canada as Rockwell International Suspension Systems Company, with the business purpose of manufacturing and selling automotive springs. |
| 1986-07 |
Established Rockwell International Suspension Systems Company in Canada through a joint venture with Rockwell International Corporation of the United States, focusing on manufacturing and selling automotive springs. (Renamed to Meritor Suspension Systems Company in October 1997) |
| 1991-10 |
In October Heisei 3, a joint venture with Rockwell International Corporation of the United States was established in the United States as Rockwell International Suspension Systems Company U.S. |
| 1991-10 |
Established Rockwell International Suspension Systems Company U.S. in the United States through a joint venture with Rockwell International Corporation, focusing on manufacturing and selling automotive springs. (Renamed to Meritor Suspension Systems Company U.S. in October 1997) |
| 1993-02 |
In February Heisei 5, Chiba Manufacturing Plant was newly established, relocating the spring division from Tokyo Manufacturing Plant. |
| 1993-02 |
Newly established Chiba Manufacturing Plant and relocated the spring division from Tokyo Manufacturing Plant. |
| 1994-03 |
In March Heisei 6, the special steel division of Tokyo Manufacturing Plant was relocated to Muroran City, and manufacturing was transferred to Mitsubishi Muroran Special Steel Co., Ltd., established with 70% investment from the company. |
| 1994-03 |
Transferred the special steel steel material division of Tokyo Manufacturing Plant to Muroran City and transferred manufacturing to Mitsubishi Steel Muroran Special Steel Co., Ltd., established with 70% investment from our company. |
| 1994-10 |
In October Heisei 6, a joint venture with Bangkok Spring Industrial Co., Ltd. of Thailand was established as Bangkok Magnet Corporation Co., Ltd., with the business purpose of manufacturing and selling cast magnets. |
| 1994-10 |
Established Bangkok Magnet Corporation Co., Ltd. in Thailand through a joint venture with Bangkok Spring Industrial Co., Ltd., focusing on manufacturing and selling cast magnets. |
| 1999-03 |
In March Heisei 11, the business of precision castings for gas turbines, including moving and static blades, was transferred to Mitsubishi Heavy Industries, Ltd. |
| 1999-03 |
Transferred the business of precision casting products related to gas turbines to Mitsubishi Heavy Industries Ltd. |
| 1999-12 |
In December Heisei 11, BANGKOK MAGNET CORPORATION Co., Ltd. started its precision spring business. |
| 1999-12 |
Started precision spring business at Bangkok Magnet Corporation Co., Ltd. (Renamed to MSM (Thailand) Co., Ltd. in September 2000) |
| 2000-08 |
In August Heisei 12, the overseas factories PSK Cebu and PSK Manila of Precision Spring Co., Ltd. were fully acquired as subsidiaries. |
| 2000-08 |
To expand the precision parts business, fully acquired the overseas factories of Precision Spring Co., Ltd., PSK Cebu and PSK Manila. (Renamed to MSM Cebu, Inc. and MSM Manila, Inc. in July 2004) |
| 2001-09 |
In September 2001, the Ichikawa Spring Factory was consolidated into the Chiba Plant. |
| 2001-09 |
Consolidated Ichikawa Spring Factory into Chiba Manufacturing Plant. |
| 2002-12 |
In December 2002, the production of precision casting at Utsunomiya Plant was fully transferred to MSM (THAILAND) CO., LTD. The same month, Ningbo Lingang Precision Components Co., Ltd. was established in China. |
| 2002-12 |
Transferred all production of precision casting at Utsunomiya Manufacturing Plant to MSM (Thailand) Co., Ltd. |
| 2002-12 |
Established Ningbo Rishoko Precision Components Co., Ltd. in China, aiming to manufacture and sell precision assembled products. |
| 2004-04 |
In April 2004, Human Electric Co., Ltd., an electronic component manufacturer, was acquired. |
| 2004-04 |
Acquired Human Electric Co., Ltd., an electronic component manufacturer, to expand the precision parts business. |
| 2004-12 |
In December 2004, Ningbo Lingang Precision Components Co., Ltd. relocated nearby to expand production capacity. |
| 2004-12 |
Ningbo Rishoko Precision Components Co., Ltd. relocated nearby to expand production scale. |
| 2005-03 |
In March 2005, the sales, development, and manufacturing divisions of the Precision Parts Business Department were consolidated in Shiohama, Ichikawa City. |
| 2005-03 |
In March 2005, the mold division of Utsunomiya Plant and the mold division of the Precision Parts Business Department were consolidated, and a mold center was established in Shiohama, Ichikawa City. |
| 2005-03 |
Consolidation of the sales, development, and manufacturing divisions of the Precision Parts Business Department in Ichikawa City, Shiobara. |
| 2005-03 |
Consolidation of the mold divisions of Utsunomiya Plant and the Precision Parts Business Department, and establishment of the Mold Center in Ichikawa City, Shiobara. |
| 2005-04 |
In April 2005, it was merged with Precision Spring Co., Ltd. |
| 2005-04 |
In April 2005, Hyogo Foundry Co., Ltd. was absorbed, and Hirota Manufacturing Plant was established. |
| 2005-04 |
Absorption and merger of Precision Spring Co., Ltd. |
| 2005-04 |
Absorption of Hirota Steel Works, established in February 1983 by separating from our company Hirota Steel Works, and establishment of Hirota Manufacturing. |
| 2006-02 |
In February 2006, Ningbo Lingang Spring Co., Ltd. was established in China with the business purpose of manufacturing and selling automotive springs. |
| 2006-02 |
Establishment of Ningbo Lingang Spring Co., Ltd. in China for the purpose of manufacturing and selling automotive springs. |
| 2006-07 |
In July 2006, PT. MSM INDONESIA was established in Indonesia. |
| 2006-07 |
Establishment of PT. MSM Indonesia in Indonesia. |
| 2006-10 |
In October 2006, Human Electric Co., Ltd. was merged and absorbed. |
| 2006-10 |
Absorption and merger of Human Electric Co., Ltd. |
| 2009-10 |
In October 2009, Meritor Suspension Systems Company and Meritor Suspension Systems Company U.S. were acquired and became subsidiaries, with their names changed to MSSC CANADA and MSSC US respectively. |
| 2009-10 |
Acquisition of shares from a joint venture partner and making Meritor Suspension Systems Company and Meritor Suspension Systems Company U.S. subsidiaries, with the names changed to MSSC CANADA and MSSC US respectively. |
| 2013-01 |
In January 2013, Utsunomiya Plant was closed. |
| 2013-01 |
Closure of Utsunomiya Plant. |
| 2013-04 |
In April 2013, the North American subsidiaries and business companies were merged, and their names were changed to MSSC CANADA INC., MSSC US INC., and MSSC INC. |
| 2013-04 |
Integration of North American (Canada and U.S.) joint ventures and business companies, with name changes to MSSC CANADA INC., MSSC US INC., and MSSC INC. |
| 2013-09 |
In September 2013, MSM MANILA, INC. was closed. |
| 2013-09 |
Closure of MSM MANILA, INC. |
| 2014-04 |
In April 2014, a joint venture was established with India’s Stumpp Schuele & Somappa Springs Pvt. Ltd., forming MSM SPRING INDIA PVT. LTD. and Stumpp Schuele & Somappa Auto Suspension Systems Pvt. Ltd. |
| 2014-04 |
Establishment of two joint ventures with Stumpp Schuele & Somappa Springs Pvt. Ltd. in India: MSM SPRING INDIA PVT.LTD. and Stumpp Schuele & Somappa Auto Suspension Systems Pvt. Ltd. |
| 2014-08 |
In August 2014, capital participation was made in PT. JATIM TAMAN STEEL MFG. in Indonesia. |
| 2014-08 |
Participation in Indonesia's special steel electric furnace manufacturer PT. JATIM TAMAN STEEL MFG. for overseas expansion of the special steel steelmaking business. |
| 2016-03 |
In March 2016, the Jakarta branch of PT. MSM INDONESIA was opened in Indonesia. |
| 2016-03 |
Opening of Jakarta branch of PT. MSM Indonesia in Indonesia. |
| 2016-04 |
In April 2016, a technical development center was established within the Chiba Plant premises. |
| 2016-04 |
In April 2016, MSSC MFG MEXICANA, S.A. DE C.V., a manufacturer and seller of automotive springs, was established in Mexico. |
| 2016-04 |
Establishment of a technology development center within Chiba Plant. |
| 2016-04 |
Establishment of MSSC MFG MEXICANA, S.A. DE C.V. in Mexico for manufacturing and selling automotive springs. |
| 2018-01 |
In January 2018, acquired additional shares of PT. JATIM TAMAN STEEL MFG. and made it a consolidated subsidiary. |
| 2018-01 |
Additional acquisition of shares of PT. JATIM TAMAN STEEL MFG. and making it a consolidated subsidiary. |
| 2018-04 |
In April 2018, acquired the German spring manufacturer Gebrüder Ahle GmbH & Co. KG (Ahle) and made it a 100% subsidiary. |
| 2018-04 |
Acquisition of German spring manufacturer Gebrüder Ahle GmbH & Co. KG (Ahle) and making it a 100% subsidiary. |
| 2018-09 |
In September 2018, changed the company name of Gebrüder Ahle GmbH to MSSC Ahle GmbH. |
| 2018-09 |
Change of company name to MSSC Ahle GmbH. |
| 2021-04 |
In April 2021, MSM CEBU, INC. changed its trade name to MSM Philippines Mfg. Inc. |
| 2021-04 |
MSM CEBU, INC. changed its trade name to MSM Philippines Mfg. Inc. in conjunction with the restart of Manila factory in addition to Cebu factory. |
| 2024-07 |
In July 2024, MSSC Ahle GmbH entered bankruptcy proceedings and was excluded from the consolidated subsidiaries. |
| 2024-07 |
Due to MSSC Ahle GmbH entering bankruptcy proceedings, the company has been excluded from the consolidated subsidiaries. |
