| 1956 | December | Establishes Tohshin Seiki Co., Ltd. to manufacture cylindrical rollers for bearings. (the present Tohshin Seiki Co., Ltd.). |
|---|---|---|
| 1958 | January | Prototype receives a high evaluation, and the full-scale sales start. |
| 1961 | November | Joins the Japan Bearing Industrial Association. |
| 1962 | April | Relocates the head plant to Terai (the present Nomi City), applicable to the prefectural and municipal ordinance to attract industry. Starts manufacturing tapered rollers. |
| 1968 | May | Starts manufacturing spherical rollers. Adds on No.5 and No.6 plants. |
| 1971 | June | Establishes Tohshin Technical Services Co., Ltd. (the present Tohshin Technical Co., Ltd.) within the head plant as the equipment maintenance division. Adds on No.4 plant. |
| 1974 | April | Starts manufacturing hollow rollers. Adds on No.1 and No.2 plants. |
| 1981 | April | Tohshin Technical Services relocates the head plant to the Ao Industrial Park in Terai. |
| 1982 | October | Starts mass production of precision shafts, pins and needle rollers. Adds on heat treatment plant. |
| November | Develops the grinding machine model TO-20 No.1 machine, and starts the continual renewal for the internal use. | |
| 1985 | July | Completes Technical Center (headquarters administration building). |
| 1987 | April | Ishikawa Prefecture designates our plant as a TQC model plant. |
| November | MITI recognizes the Vane Pumps as a product to improve small company technology. | |
| 1988 | February | Starts selling CNC Centerless Grinders. |
| July | Establishes TON Co., Ltd. (the present Tohshin Co., Ltd.) | |
| 1990 | June | Completes Tohshin Welfare Center. |
| 1991 | March | Reorganizes the Tohshin group companies into Tohshin Seiki Co., Ltd., Tohshin Technical Co., Ltd. and Tohshin Co., Ltd. |
| April | Tohshin Technical relocates the new head plant to Kokufudai in Komatsu City. Starts full-scale sales of Centerless Grinders and Vane Pumps. | |
| 1995 | April | Tohshin Seiki is designated as the small company rationalization model plant. |
| May | Tohshin Technical's CNC centerless grinder TO-60 series gets awarded with the Brand Grand Prize by Ishikawa, and the Technology Prize by Advanced Process Association. | |
| 1996 | March | Tohshin Seiki concentrates the lathe turning process at the Ao No.1 Plant. |
| 1997 | January | Tohshin Seiki gets awarded with the Medium and Small Business Research Institute Prize. |
| 1998 | April | Tohshin Technical releases a whole house washing system called "Home Fresh Water System." |
| 1999 | April | Tohshin Seiki adds on Ao No.1 Plant to strengthen the lathe turning process. |
| 2000 | December | Tohshin Seiki acquires ISO9002 in 1994 (RvA: DNV) (renewed to ISO9001: 2000 in 2003/12). |
| 2001 | March | Tohshin Technical's index infeed type CNC centerless grinder TO6020-IF wins the Gold Prize in the Ishikawa Brand Excellent New Product Machine Industry Division. |
| 2002 | May | Tohshin Technical develops the world top class silent Vane Pumps series. |
| November | Tohshin Seiki adds on No.7 plant. | |
| 2003 | March | Tohshin Technical develops Sigma II series. |
| June | Tohshin Technical develops the angular centerless grinder TO-6020S-A. | |
| 2004 | December | Tohshin Technical acquires ISO9001: 2000 (RvA: DNV). |
| 2005 | March | Tohshin Seiki acquires ISO14001: 1996 (RvA: DNV) (renewed to ISO14001: 2004 in 2006/3). |
| December | Tohshin Seiki adds on Delivery Center. | |
| 2006 | April | Tohshin Seiki is selected as one of the “Top 300 of Japan's Exciting Monozukuri (Manufacturing) SMEs” by the Small and Medium Enterprise Agency, Ministry of Economy, Trade and Industry. |
| December | Tohshin Seiki adds on Ao No.2 plant and integrates the processes for manufacturing tapered rollers into one plant. | |
| 2007 | December | Tohshin Technical acquires ISO14001: 2004 (RvA: DNV). |
| 2008 | October | Tohshin Technical develops the low environmental burden type centerless grinder TO-6045 II. |
| 2010 | February | Tohshin Seiki receives a “Jury’s Encouragement Prize of IT Management Awards for Small and Medium Enterprises” by the Ministry of Economy, Trade and Industry. |
| 2014 | March | Tohshin Seiki Selected as one of the 100 Global Niche Top Companies by the Ministry of Economy, Trade and Industry. |
| May | Tohshin Technical develops miniature centerless grinder TO-3020T-FF. | |
| November | Tohshin Seiki Received the "Good Company Award/Grand Prix" from the Research Center for Small and Medium Enterprises. | |
| 2016 | October | Tohshin Seiki expands the north building of the Ao No. 2 plant to strengthen the production of automobile-related rollers, including needle rollers. |
| 2016 | October | Tohshin Technical develops TO-6040T-FC-TF, a fixed type centerless grinding machine. |
| 2020 | June | Tohshin Seiki renovates the No. 2 plant to strengthen the capacity of the Heat Treatment. |
| 2022 | June | Tohshin Seiki Receives the Ishikawa Prefecture Employers Association "Kagayaki Company Award." |
| 2022 | August | Tohshin Technial’s Centerless Grinder TO-6040T-FC-TF is certified as a good Ishikawa brand product. |
| 2023 | January | Tohshin Group implemented a business restructuring of group companies, making Tohshin Corporation as the group management company (holdings). |
| 2023 | March | Tohshin Group certified as Health and Productivity Management Organization （Top “Bright” 500 Small and Medium-sized Enterprises） by Ministry of Economy, Trade and Industry. |
