President Greeting


Since founded in 1976, KSK Co., Ltd. has offered wear-resistant tools to customers of semiconductor and electric component industries in Japan and overseas by utilizing precision grinding technology.

We do common things well such as satisfy customers' requested quality and keep delivery time, and try to construct company which is trusted by many customers continuously.

We also train up employees to be a person who learns, proposes and acts proactively for the sake of sustainable development. Furthermore, we aim to keep on improving work environment for all employees spend healthful and happy life. 

President Ryo KAWAHARA

Philosophy and Motto


Make the impossible possible, Supply products with high creativity, and Contribute to society



- Produce helpful products for those who live on the earth with creativity and originality

- Exist, prosper and develop together with strictly technical innovation

- Contribute to society, build a paradise for worker and realize a dream each other

- Anytime think that there are infinite ways against any trouble and difficulty

Company Overview

 Name KSK Co., Ltd.
Representative CEO            Tadayuki KYOTANI
President     Ryo KAWAHARA
Location 4321-1 Kawasaki, Hiji, Hayami, Oita 879-1505, Japan
 TEL: +81-977-72-8330  
FAX: +81-977-72-8342  
Capital 10 Million (JPY)
Foundation November 12, 1984


1976 Started privately run in Saeki, Oita prefecture.
1982 Moved to Hiji, Hayami, Oita.
1984 Structural change to KOTANI SEIKO.
1989 Moved to current location (Plant#1).
1991 Structural change to KSK Co., Ltd.
1995 Plant #2 completed.
2005 Plant #3 completed.
2018 Capital alliance with PMT CORPORATION.

Adopted to「事業再構築補助金」

Set up Medical Component Section newly.

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