Please feel free to contact to TNK for precision shaft, roller, Needle, Lead screw and materials.

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July 1946 Establish limited partnership, TANAKA MFG. at location of current head office. Produce vehicle bearings.
March 1963 Rename 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 award from The Small and Medium Business Research Institute.
December 1986 Capital increased to 198,000,000 yen.
August 1987 Tsukuba Plant built more it 2, 200 square meters.
March 1990 Introduce new production system.
July 1992 Complete new distribution system by introducting automated rack system.
March 1993 Establish sales base in Hong Kong.
May 1994 Establish FUZHOU SANWA PRECISION CO.,LTD. in Fuzhou, fujian Province, china.
December 1994 FUZOU SANWA PRECISION CO.,LTD. commences operation.
May 1998 Tsukuba Plant complete Turning Factory and Distribution Center.
August 2000 Tsukuba Plant achieve ISO 14001:1996 certification.
March 2003 Transferand expansion of FUZHOU SANWA PRECISION CO.,LTD.
January 2004 Head office and Tsukuba Plant achieve ISO 9001:2000 certification.
February 2005 FUZHOU SANWA PRECISION CO.,LTD achieve ISO 9001:2000 and ISO 14001:1996 certification.
April 2006 Elected to "Introducing 300 of Japan's Exciting. Monodukuri(Manufacturing) SEMs " by Small and Medium enterprise Agency.
August 2006 FUZHOU SANWA PRECISION CO.,LTD achieve ISO/TS 16949:2002 certification.
October 2007 Capital decrease to 100,000,000 yen.

February 2009

Head office function shift to Tsukuba plant.
July 2012 FUZHOU SANWA PRECISION CO.,LTD renewal ISO 9001:2008 ISO/TS 16949:2009 certification.
August 2012 Tsukuba plant and FUZHOU SANWA PRECISION CO.,LTD renewal ISO 14001:2004 certification.



Tsukuba Plant renewal ISO 9001:2008 certification.
May 2013 Presented the Quality prize for fiscal 2012 from DENSO corporation.
May 2014 Join Japan Auto Parts Industries Association.



Tsukuba Plant renewal ISO 14001:2015 certification.

October 2017

Tsukuba Plant achieve IATF16949:2016.

April 2018

Kenji Nakamura, CEO, received the "Order of the Rising Sun Silver Rays" in the spring honors.


Tsukuba Plant achieve IATF16949.

(Site: Tsukuba Plant・Tsukuba Plant Building A)

(Scope: Manufacturing Micro shaft and Metal packing)

  • Sample・Spot order
  • For Factory in China
  • Looking for the Automotive parts