| 1946-05 |
Separated from Japan High-Frequency Heavy Industries Co., Ltd., established High Frequency Thermal Processing Co., Ltd., and started manufacturing high-frequency quenching equipment and surface quenching contract work for various machine parts at Tamagawa Factory |
| 1946-05-15 |
Established on May 15, 1946 (Showa 21) |
| 1946-05-15 |
Established: May 15, 1946 (Current company name) |
| 1947-03 |
Established Kyoto Factory (now closed) within the Applied Science Research Institute Foundation, and started high-frequency quenching contract work |
| 1955-08 |
Received Ministry of International Trade and Industry subsidy for research on induction heating devices using saturated reactors |
| 1955-08 |
Received a Ministry of International Trade and Industry subsidy for research on induction heating devices using saturated reactors |
| 1956-08 |
Received Ministry of International Trade and Industry subsidy for research on PC steel bars |
| 1957-07 |
Received Ministry of International Trade and Industry subsidy for research on surface sub-hot rolling of ultra-high tensile steel |
| 1957-07 |
Received a Ministry of International Trade and Industry subsidy for research on low-carbon high-strength steel bars |
| 1961-07 |
Received Ministry of International Trade and Industry subsidy for research on surface sub-hot rolling of ultra-high tensile steel |
| 1962-11 |
Established Hiratsuka Factory (current: Product Business Division, Manufacturing Department, Hiratsuka Factory) |
| 1964-10 |
Developed and started sales of special-shaped PC steel bar 'Urbond' for quenching products |
| 1970-07 |
Developed and started sales of shaped PC steel bars for CPC Hume pipes |
| 1971-10 |
Established Kariya Factory and Akaho Factory |
| 1971-10 |
Newly established Kariya Factory |
| 1971-10 |
Newly established Akō Factory |
| 1973-05 |
Established Netsuren Hirakata Co., Ltd. |
| 1976-07 |
Established a joint venture in Korea, Koryo Thermal Processing Co., Ltd. |
| 1976-10 |
Developed and started sales of PC steel bars for box culverts |
| 1977-02 |
Started sales of hoop reinforcement and flexible reinforcement (high-strength shear reinforcement Urbon 1275) |
| 1977-04 |
Developed and started selling bonded PC steel bars |
| 1977-10 |
Development and commercialization of high-frequency heat-treated spring steel wire |
| 1980-06 |
Established Nagoya Factory |
| 1980-06 |
Established Netsuren Minami Co., Ltd. |
| 1983-06 |
Established Netsuren Kofu Co., Ltd. (now Netsuren Heat Treat Co., Ltd.) |
| 1985-03 |
Obtained general certification for Urbon Spiral Hoop Reinforcement (Ministry of Construction East Japan Office No. 51) |
| 1985-09 |
Established Netsuren Komatsu Co., Ltd. |
| 1987-07 |
Established a joint venture in Korea, Korea Heat Treat Co., Ltd. |
| 1989-03 |
Signed a technology licensing agreement with U.S. Piller Corporation (Transistor Inverter) |
| 1990-08 |
Established Hiratsuka Factory (now IH Business Division Electrical Equipment Department Hiratsuka Factory) |
| 1991-10 |
Established Netsuren Kofu (now Netsuren Heat Treat Co., Ltd.) Yamagata Factory and Iwaki Factory |
| 1991-10 |
Newly established Iwaki Factory |
| 1991-10 |
Newly established Netsuren Kofu (currently Netsuren Heat Treatment Co., Ltd.) Yamagata Factory |
| 1992-04 |
Established Nagoya Factory |
| 1994-06 |
Signed a technology transfer agreement with MUHR UND BENDER |
| 1994-06 |
Signed a manufacturing technology licensing agreement with Suzuki Metal Industries Co., Ltd. (currently Nittetsu SG Wire Co., Ltd.) |
| 1994-10 |
Established a joint venture in Indonesia, PT. NETUREN INDONESIA |
| 1994-10 |
Signed a manufacturing technology licensing agreement with MUHR UND BENDER |
| 1995-10 |
Participated in capital in Hokuriku United Forging Industry (now PT Komatsu Undercarriage Indonesia) in Indonesia |
| 1996-04 |
Signed a technology transfer agreement with MUBEA |
| 1996-05 |
Changed corporate name to "Netsuren" |
| 1996-05 |
The designation is changed to 'Netsuren' |
| 1996-11 |
Established NETUREN USA, INC. in the United States |
| 1999-01 |
Established Netsuren Himek Co., Ltd. |
| 1999-09 |
Signed a technology transfer agreement with Taiwan Hesun Enterprise Co., Ltd. (Transistor Inverter) |
| 1999-12 |
Signed a technology transfer agreement with Piller Inc. in the United States (Transistor Inverter) |
| 2000-07 |
Established a joint venture in the United States, NETUREN AMERICA CORPORATION |
| 2000-07 |
Newly established Netsuren Heat Treatment Gifu Factory and Niigata Factory |
| 2001-07 |
Relocated headquarters (Oval Court Osaki West, Higashi-Gotanda, Shinagawa-ku, Tokyo) |
| 2003 |
Started sales of hollow rack bars |
| 2003-07 |
Established a joint venture company Shanghai Zhonglian Wire Co., Ltd. in China (Shanghai) |
| 2003-08 |
Newly established Okoyama Factory |
| 2005-08 |
Established a joint venture company Shian High-Frequency Heat Treatment Co., Ltd. (consolidated subsidiary) in China (Jiangsu Province) |
| 2006-01 |
Relocated headquarters to Shinagawa-ku, Tokyo, at Oval Court Osaki Mark West |
| 2006-07 |
Established a joint venture company Guangzhou Fengtong Heat Treatment Co., Ltd. (consolidated subsidiary) in China (Guangdong Province) |
| 2008-10 |
Newly established Kobe Factory |
| 2008-10 |
Started sales of rotary wheels |
| 2011-02 |
Established a subsidiary High-Frequency Heat Treatment (China) Bearing Co., Ltd. in China (Shandong Province) |
| 2011-04 |
Iwaki Factory and Akō Factory received certification as excellent welding shear reinforcement manufacturing companies. Certification number: JRJI-優補-008-009 |
| 2013-01 |
Established a specific subsidiary Neturen Czech s.r.o. in the Czech Republic |
| 2013-09 |
Established a joint venture PT. NETUREN INDONESIA in Indonesia |
| 2013-11 |
Participated financially in Tianjin Fengdong Heat Treatment Co., Ltd. in Tianjin, China |
| 2013-11 |
Newly established Ibaraki Factory |
| 2015-04 |
Established NETUREN MEXICO, S.A. de C.V. in Mexico |
| 2016-01 |
Newly established Kani NH Factory |
| 2019-04 |
Newly established Human Resource Development Center |
| 2020-12 |
Established a branch office of Shanghai Zhonglian Wire Co., Ltd. in Chongqing, China |
| 2022-04 |
Transitioned from the First Section of the Tokyo Stock Exchange to the Prime Market due to review of market classification |
| 2025-04 |
Made a consolidated subsidiary through acquisition of Doken Co., Ltd. |
| 2025-11 |
Made a consolidated subsidiary through acquisition of MDI Co., Ltd. |
