| 1949-12 |
Based on the approval of the corporate reconstruction plan, separated from Nippon Steel Corporation's steel division and established as Nisso Steel Corporation. Focused on utilizing domestic resources, started smelting pig iron from sand iron, and began producing pig iron in electric furnaces. |
| 1949-12-01 |
Establishment |
| 1952-01 |
Listed on the Tokyo Stock Exchange and Osaka Securities Exchange |
| 1954-03 |
Focused on the future potential of alloy steels, especially ferronickel, and converted the sand iron pig iron facilities at the Shibata plant into ferronickel smelting facilities. |
| 1957-05 |
Hachinohe plant completed, began manufacturing pig iron. |
| 1959-05 |
Separated from Taiheiyo Nickel Corporation upon its establishment, renamed Taiheiyo Metal Corporation. Established as a leading ferronickel manufacturer. |
| 1965-04 |
Converted part of the pig iron production equipment at Hachinohe plant for alloy steels and ferronickel smelting, and started production of stainless steel via integrated ore processing methods in 1966 and 1968 respectively. Installed large electric furnaces of 25,000 KVA in 1969 and 40,000 KVA in 1970 to increase ferronickel production. |
| 1970-01 |
Absorbed and merged with Taiheiyo Nickel Corporation, renamed Taiheiyo Metal Corporation, establishing a top position in ferronickel manufacturing. |
| 1970-01 |
Merged with Pacific Nickel Corporation and renamed to Pacific Metal Corporation
Established a foundation as a top manufacturer of ferronickel |
| 1970-10 |
Philippines office opened |
| 1972-05 |
Signed technical assistance agreement for the construction of ferronickel smelting plant in Ankatambang, Indonesia (Antam project) |
| 1973-03 |
Participated financially in Rio Chuba Nickel Mine Corporation in the Philippines and developed nickel mines. |
| 1979-07 |
Niigata plant completed. Relocated electromagnetic materials and activated carbon departments from Shibata plant. |
| 1983-06 |
Separated Iwase plant and transferred grinding materials division to Taiheiyo Landom Corporation. |
| 1984-07 |
Separated Naoetsu, Toyama, and Narashino plants, and transferred casting, forging, and machinery divisions respectively to Taiheiyo Special Castings Co., Ltd., Taiheiyo Steel Co., Ltd., and Taiheiyo Machine Co., Ltd. |
| 1985-04 |
Hachinohe plant renamed Hachinohe Manufacturing Plant |
| 1995-04 |
Installed a 60,000 KVA ferrometallurgical furnace at Hachinohe Works, establishing a three-furnace system |
| 1996-04 |
Completion of the second pier at Hachinohe Port Kawaramuki (public) |
| 1997-01 |
Established Taiheiyo Energy Center Co., Ltd. |
| 1997-04 |
Completion of raw material conveyor line equipment (Kawaramuki) |
| 1998-04 |
Obtained ISO9002, then migrated to ISO9001:2000 in April 2003 |
| 1999-08 |
Relocated headquarters to Hachinohe and became a dedicated ferrometallurgical manufacturer |
| 2000-07 |
North Numata Power Plant of Taiheiyo Energy Center Co., Ltd. began power supply |
| 2003-08 |
Completion of waste recycling project "Incineration Ash and Scallop Shell Recycling Facility" |
| 2006-06 |
Completion of waste recycling project "Melted Fly Ash Recycling Facility" |
| 2006-11 |
Completion of enhancement work for ferrometallurgical production line (No. 6 kiln, No. 8 furnace) |
| 2008-10 |
Jakarta Office opened |
| 2009-03 |
Obtained ISO14001:2004 |
| 2009-07 |
Completion of wet pilot plant equipment |
| 2009-12 |
Completion of enhancement work for ferrometallurgical production line (No. 3 kiln, No. 7 furnace) |
| 2010-05 |
Completion of wind-shattered slag processing plant |
| 2012-02 |
Obtained OHSAS18001:2007 |
| 2013-06 |
Start of wastewater final treatment facility operation |
| 2014-04 |
Start of integrated management system operation |
| 2020-01 |
Liquidation of Taiheiyo Energy Center Co., Ltd. |
| 2020-01 |
Liquidation of Pacific Ocean Energy Center Co., Ltd. |
| 2022-04 |
Transition from First Section of Market to Prime Market due to review of Tokyo Stock Exchange market classification |
| 2023-03 |
Withdrawal from the waste recycling business of "Incineration Ash and Scallop Shell Recycling Business" |
| 2024-03 |
Registered as a retail electricity business operator with the Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry |
| 2025-04 |
Start of electricity supply in retail electricity business |
| 2026-01 |
Start of calcium aluminate manufacturing and sales business |
