President Greeting

KSK Co., Ltd. was founded in 1976.

We meet to various specifications that customer requests by utilizing machining technology that we have built up since our foundation, and pursue "high quality, short delivery time, and low cost" strictly.

With using approximately 2,000 pieces of diamond wheel, our processing technology is highly evaluated around semiconductor, automotive and mass-production site of other industries.

President Toshiyuki KOTANI

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   Toshiyuki KOTANI
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.