We develop and produce a product
which meets customer needs with our variety of persistence.

O-oka's precision forging gears are
supplied to many OEM/Tier companies all over the world.

Main customers

  • Adam Opel (Germany/ Austria)
  • EATON (Brazil/ Poland)
  • Fiat Chrysler Automobiles (Italy/ Argentine/ USA)
  • Getrag (Germany/ Italy/ Mexico)
  • General Motors (USA/ Brazil/ Korea)
  • HAVECO (China)
  • MAGNA-Powertrain (Germany/ Mexico)
  • Musashi (Brazil)
  • PSA (France)
  • RENAULT (France/ Spain/ Romania)
  • Schaeffler (Germany)
  • Shanghai Automobile Gear Works (China)
  • SKODA (Slovakia)
  • Volkswagen (Germany/ China)
  • ZF (Germany/ Brazil/ USA)

Sales ratio for Overseas

2016 81%
2017 85%
2018 85%
2019 85%
2020 84%

Ideal location
for shipment to Overseas

Provide you a highly efficient production and high quality which gathered into all in domestic based on a name as a "Made in Japan." Our production sites are located ideally for shipment to overseas and ensures delivery on time.

Domestic plant location

Ideal location  for overseas shipment

Overseas support network covered all over the world


In Europe where MT/DCT are major in the market, Our competent staffs will visit customers and plants in a timely and provide you excellent service.

EU Office


North / South America

It covers North America, a major market for AT/4WD, and South America, a big market of MT. Our staff provides you a professional service and and useful information is obtained by O-oka's worldwide network.

USA Office

North / South America

China / Asia

It Provides O-oka’s comprehensive service to Local car manufacturer and foreign manufacturer through O-oka's worldwide network.

Dalian Office

China / Asia

Inquiry for products

by telephone or inquiry form below

81565523441inquiry form