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| July 1946 |
Establish limited partnership, TANAKA MFG. at location of current head office. Produce vehicle bearings |
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| March 1963 | Renama company to TNK SANWA PRECISION CO.,LTD.Begin production of microshafts.. |
| March 1969 | Complete 1ST phase of Tsukuba Plant construction, begin operation. |
| March 1971 | Capital increased to 30,000,000 yen. |
| June 1976 | Capital increased to 60,000,000 yen. |
| January 1981 | Complete construction of Head Office building. |
| June 1981 | Capital increased to 99,000,000 yen. |
| August 1982 | Complete 7th phase of Tsukuba Plant, No.4 Plant(Precision Mass Production Plant) construction. |
| October 1983 | Presented "Select 50 FA Plant" Award from Nihon Keizai Shimbun,Inc. |
| January 1986 | Presented awaed from The Small and Medium Business Research Institute. |
| December 1986 | Capital increased to 198,000,000 yen. |
| September 1987 | TNK PRECISION (U.S.A.) CORP.established and operation brgins. |
| March 1990 | Introduce new production system. |
| July 1992 | Completa new distribution system by introducting automated rack system |
| March 1993 | Establish sales base in Hong Kong. |
| October 1993 | Establish sales base in Singapore. |
| May 1994 | Establish FUZHOU SANWA PRECISION CO.,LTD. in Fuzhou, fujian Province, china. |
| November 1994 | TNK PRECISION (USA) CORP. and transfer facilities to China. |
| December 1994 | FUZOU SANWA PRECISION CO.,LTD. commences operation. |
| January 2000 | SANWA PRECISION (HK) CO.,LTD. CHANGAN FACTORY commences operation. |
| August 2000 | Tsukuba Plant Achieve ISO 14001:1996 certification. |
| Maech 2003 | Transferand expansion of FUZHOU SANWA PRECISION CO.,LTD. |
| January 2004 | Head office and Tsukuba Plant Achieve ISO 9001:2000 certification. |
| August 2005 | Tsukuba Plant renewal ISO 14001:2004 certification. |
| April 2006 | Elected to "Introducing 300 of Japan's Exciting. Monozukuri(Manufacturing) SEMs " by Smaii and Medium enterprise Agency. |
| November 2006 | Integrate SANWA PRECISION(S) PTE.,LTD. with SANWA PRECISION(HK) CO.,LTD. |
| October 2007 | Capital decrease to 100,000,000 yen. |
| September 2008 | Integrate SANWA PRECISION (HK) CO.,LTD.CHANGAN FACTORY with FUZHOU SANWA PRECISION CO.,LTD. |
| February 2009 | Head office function shift to Tsukuba plant. |