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Company Profile

Company Name
Chairman Motoyasu Nakamura
President Yoshikazu Konishi
Head office
2-34 Minami Uematsu-Cho, Yao City, Osaka, Japan             Access Map≫
TEL: 072-922-7881(General) / FAX: 072-922-7886
Established on
August 08, 1961
1,100 million yen
Single: 1,214 employees Married: 2,547 employees
Business activities
Machine Tools : Centerless grinding machine, Surface grinding machine, Multi-head grinding machine, Special purpose grinding machine
FA Systems : Automatic measuring systems, Automatic assembly systems, Combined systems
Precision Apparatus : Precison ball screws, Indexing chucks, Spindle units
Drive shafts
Intermediate steering shafts
Public Certifications Acquired
Yao plant April, 2001 ISO14001 Certification
October, 2004 ISO9001 Certification
February, 2006 JISHA OSHMS Accreditation
Yuzaki plant December, 1999 ISO9001 Certification
March, 2000 QS-9000 Certification
April, 2001 ISO14001 Certification
November, 2006 JISHA OSHMS Accreditation
ISO/TS16949 Certification
May, 2018 IATF16949 Certification
Gojo plant April, 2001 ISO14001 Certification
October, 2004 ISO9001 Certification
February, 2006 JISHA OSHMS Accreditation
Tokyo branch May, 2007 ISO14001 Certification
Chubu branch May, 2007 ISO14001 Certification
Patents and Technical tie-ups
146 Japanese patents and 85 overseas patents
8 technical tie-ups

China: Wuxi Koyo Machine Industries Co.,Ltd.
<Centerless grinders, horizontal surface grinders>
China: Koyo Machinery (Wuxi) Co., Ltd. <Grinders>
China: Koyo Joint (Xiamen) Co.,Ltd. <Intermediate shafts>
Thailand: Koyo Joint (Thailand)Co.,Ltd. <Intermediate shafts>
America: KOYO MACHINERY U.S.A.,INC <Grinders>
America: JTEKT Automotive Texas,L.P. <Intermediate shafts>
South Korea: Tongil Industries Co.,Ltd. <Ball screws>
Mexico: Koyo Joint Mexico,S.A.de.C.V. <Intermediate shafts>

In-licenses: Germany: FORKARDT CO.,LTD. <Indexing chucks>

Company History

August, 1961
Separated from Koyo Seiko Co., Ltd. (currently JTEKT) to become an independent company
October, 1961
Commenced operation (company capital 200 million yen)
November, 1962
Commenced operation of Yao Plant
August, 1963
U.S.A.: Technical tie-up with Van Norman Machine Tool Company, started production of centerless grinders
December, 1963
U.S.A.: Technical tie-up with Mattison Machine Works, started production of surface grinders
October, 1967
Started production of drive shafts
May, 1969
Capital increased to 400 million yen
October, 1972
Germany: Technical tie-up with FORKARDT CO.,LTD., started production of indexing chucks
December, 1977
Started production of intermediate shafts
October, 1980
Started production of precison ball screws
September, 1982
Capital increased to 600 million yen
February, 1983
Started production of spindle units
April, 1988
Started production of automatic measuring systems (FA systems)
February, 1989
Capital increased to 1,100 million yen
August, 1991
Commenced operation at Yuzaki Plant
December, 1991
Established overseas affiliate company KOYO MACHINERY U.S.A.,INC.(KMU) in Detroit, U.S.A.
February, 1994
Joint Venture in Wuxi, China: Established Wuxi Koyo Machine Industries Co.,Ltd.
April, 1995
Commenced operation at Gojo Plant
August, 1996
Established independent company Koyo Machinery (Wuxi) Software Co.,Ltd. (KWS) in Wuxi, China
January, 1997
Established Kohki-Techno Co.,Ltd.
May, 1999
Reiocated KMU to new company building (Plymouth, Michigan)
December, 1999
Acquired ISO9001 certification at Yuzaki Plant
March, 2000
Acquired QS9000 certification at Yuzaki Plant
May, 2001
Acquired ISO14001 certification at Yao Plant, Yuzaki Plant, and Gojo Plant
July, 2001
Established overseas affiliated company Koyo Joint(Thailand)Co.,Ltd.(KJT) in Thailand
January, 2003
Established South Korea Branch
July, 2004
Acquired capital in Shye Fu Koyo (Xiamen) Mechanical Industry Co.,Ltd. (SF-Koyo)
October, 2004
Acquired ISO9001-2000 certification at Yao Plant and Gojo Plant
July, 2005
Acquired capital in KSTX (Koyo Steering Systems of Texas,L.P.) U.S.A. (Currently, JATX (JTEKT Automotive Texas,L.P.))
February, 2006
Acquired JISHA OSHMS accreditation at Yao Plant and Gojo Plant
November, 2006
Acquired TS16949 certification at Yuzaki Plant
Acquired JISHA OSHMS accreditation at Yuzaki Plant
May, 2007
Acquired ISO14001 Certification at Tokyo Branch Office and Chubu Branch Office
April, 2008
Completed construction of new factory at Wuxi Koyo Machine Industries Co., Ltd.
December, 2009
Company name changed from Koyo Machinery (Wuxi) Software Co.,Ltd. (KWS) to Koyo Machinery (Wuxi) Co.,Ltd. (Expansion of scope of operations)
December, 2010
Established Koyo Joint (Xiamen) Co., Ltd. (KJX) in Xiamen, China
April, 2011
South Korea Branch shut down, established overseas affiliate company Koyo Machinery Korea Co.,Ltd. (KMK)
April, 2011
Established new Machine Tools & Mechatronics Sales Department at KJT
November, 2011
Completed construction of new factory at KJT
May, 2012
Completed construction of new Factory No.5 at Yao Plant
September, 2012
Relocated KWS to a new company building (Centralized Wangzhuang Industry Park, Xinwu District, Wuxi) and added machine tool related production to scope of operations
November, 2014
Completed construction of new factory at KJX (Dongfu Town, Haicang District, Xiamen) and relocated the company office and facilities
July, 2015
Established overseas affiliate company Koyo Joint Mexico, S.A. de C.V. (KJM) in Mexico
November, 2017
Completed construction of paint shop at Yao Plant
May, 2018
Acquired IATF16949 certification at Yuzaki Plant
Started production of JTEKT Power Assist Suit (J-PAS) at Yuzaki Plant