History
| 1962 | Showa37 | Established Hara Manufacturing Co., Ltd. |
| 1991 | Heisei03 | Relocated the factory to Miyama Industrial Park in Hachioji City. |
| 1992 | Heisei04 |
Changed the company name to TKY Products Co., Ltd. and established corporation. |
| 2000 | Heisei12 | Expanded Hachioji Miyama Factory (first period) |
| 2004 | Heisei16 | Obtained ISO 9001 certification.Expanded Hachioji Miyama Factory (second period) |
| 2005 | Heisei17 | Obtained ISO 14001 certification. |
| 2006 | Heisei18 | Obtained a land for industrial use in Shimo-ongatamachi, Hachioji City, Tokyo. |
| 2007 | Heisei19 | Completed factory construction and relocated to 424-7 Shimo-ongatamachi, Hachioji City, Tokyo. |
The Pioneer of Precision Machining
