| 1954 |
- September
- Established KENSETSUBUHIN
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| 1968 |
- October
- Established Tokyo Factory in 5-chome, Matsue, Edogawa-ku, Tokyo
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| 1971 |
- August
- Established Niigata Factory in Maki-mura, Higashikubiki-gun, Niigata
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| 1985 |
- May
- Changed company name to Taiheiyo Seiki K.K.
|
| 1988 |
- September
- Established Joetsu Factory in West Industrial Park, Sanwa-mura, Nakakubiki-gun, Niigata
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| 1994 |
- November
- Established Kunshan Taiheiyo Precision Machinery Co., Ltd. in Shipai, Kunshan City, Jiangsu, China
|
| 2000 |
- January
- Separated Niigata Factory Construction Machinery Parts Machining Dept. to establish TNC Company Ltd., a wholly owned company
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| 2005 |
- February
- Relocated Kunshan Taiheiyo Precision Machinery Co., Ltd. to a new factory in order to increase production capacity
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| 2011 |
- June
- Expanded the factory at Kunshan Taiheiyo Precision Machinery Co., Ltd. in order to further increase production capacity
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| 2012 |
- January
- Established Taiheiyo Seiki Holding Co., Ltd.
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| 2020 |
- December
- Taiheiyo Seiki Holding Co., Ltd. merged Taiheiyo Seiki K.K. and changed name to Taiheiyo Seiki K.K.
|