Tohshin Corporation

Toshin Precision Machinery was founded in Kanazawa City, Ishikawa Prefecture to manufacture cylindrical roller bearings.

The prototype received high praise and sales commenced.

Joined the Japan Bearing Association.

Under Ishikawa Prefecture's industrial attraction policy for Teraichi Town (now Nomi City), the headquarters factory moved to Teraichi Town, Nomi City, and production of tapered roller bearings commenced.

Production of spherical roller bearings began, and factories 5 and 6 were added.

Toshin Technical Service (now Toshin Technical), the equipment maintenance department, was established within the headquarters factory, and Factory 4 was added.

Production of hollow roller bearings began, and factories 1 and 2 were added.

Toshin Technical's main factory moved to the Kuribune Industrial Complex in Teraichi Town.

Precision shafts, pins, and needle roller bearings began mass production, and a heat treatment plant was added.

Developed the TO-20 type 1 grinding machine, and began updating equipment within the company.

The technical center (headquarters administrative building) was completed.

Designated by Ishikawa Prefecture as a factory implementing total quality management.

As part of the SME technology improvement assistance program, the blade pump received recognition from the Ministry of Economy, Trade and Industry.

Commenced external sales of CNC hollow grinding machines.

Established TON Co., Ltd. (now Tohshin Co., Ltd.).

Toshin Welfare Center was completed.

The Toshin Group was organized into Toshin Precision Machinery, Toshin Technical, and Toshin.

Dongzhen Technical relocated its new headquarters factory to Kokufu-dai, Komatsu City, and officially started external sales of hollow grinding machines and blade pumps.

Dongzhen Precision Machine was designated as a small and medium enterprise rationalization model factory.

Dongzhen Technical's CNC hollow grinding machine TO-60 series won the 1995 Ishikawa Brand Award and the Advanced Process Association Technical Award.

Dongzhen Precision Machine concentrated its turning operations at the Kuroshio Plant 1.

Dongzhen Precision Machine received the award from the Small and Medium Enterprise Research Center Foundation.

Dongzhen Technical released the 'Home Water Purification System', a comprehensive home comfort water purification system.

Dongzhen Precision Machine strengthened its turning processes by adding the Kuroshio Plant 1.

Dongzhen Precision Machine obtained ISO 9002:1994 certification (RvA: DNV).

Dongzhen Technical's cutting-in CNC hollow grinding machine TO6020-IF received the Ishikawa Brand Excellent New Product Mechanical Department Gold Award.

Received the Precision Engineering Hokuriku Shin'yō Branch Technical Award.

Dongzhen Technical developed a blade pump series with the world's highest level of quietness.

Dongzhen Precision Machine added Plant 7.

Dongzhen Technical developed the sigma II series.

Dongzhen Technical developed the hollow grinding machine TO-6020S-A.

Dongzhen Technical obtained ISO 9001:2000 (RvA: DNV) certification.

Dongzhen Precision Machine obtained ISO 14001:1996 (RvA: DNV) certification.

Dongzhen Precision Machine added a distribution center.

Updated to ISO 14001:2004.

Dongzhen Precision Machine was selected into the Ministry of Economy, Trade and Industry's Small and Medium Enterprise Department's '300 Excellent Companies'.

Dongzhen Precision Machine added Kuroshio Plant 2, achieving process consolidation for conical roller production.

Dongzhen Technical obtained ISO 14001:2004 (RvA: DNV) certification.

Dongzhen Technical developed the environmentally friendly hollow grinding machine TO-6045 II.

Dongzhen Precision Machinery received the Ministry of Economy and Industry's "Small and Medium Enterprise Information Technology Management Excellence Award – Encouragement Award" from the Review Committee.

Dongzhen Precision Machinery was selected into the Ministry of Economy and Industry's "Top 100 Internationalized Niche Enterprises" (niche enterprises refer to companies that provide highly specialized products for segmented markets).

Dongzhen Technical developed the small hollow grinding machine TO-3020T-TF.

Dongzhen Precision Machinery received the "Excellent Enterprise Award – Best Award" from the Small and Medium Enterprise Research Center, a foundation.

Dongzhen Precision Machinery added the North Building of the Kinoshita Second Factory and strengthened production of automotive-related rollers, including needle rollers.

Dongzhen Technical developed the through-core—shaped centerless grinding machine.

Dongzhen Precision Machinery strengthened its heat treatment capabilities through the reconstruction of its factory.

Dongzhen Precision Machinery received the "Shining Enterprise Award" from the Ishikawa Prefecture Business Association, a general incorporated association.

Dongzhen Technical's centerless grinding machine TO-6040T-FC-TF was recognized as an excellent Ishikawa brand product.

Dongzhen Group's Dongzhen implemented a business restructuring to become a management company (holding group).

The entire group received the Ministry of Economy and Industry's "2023 Excellent Healthy Management Corporation (SME Department – Bright 500) Certification."

Updated to ISO 9001:2000.

The entire group received the Ministry of Economy and Industry's "2024 Excellent Healthy Management Corporation (SME Department – Bright 500) Certification."

The entire group received the Ministry of Economy and Industry's "2025 Excellent Healthy Management Corporation (SME Department – Bright 500) Certification."

The entire group received the Ministry of Economy and Industry's "2026 Excellent Healthy Management Corporation (SME Department – Bright 500) Certification."