OS Giken

Mr. Masaharu Okazaki founded OS Giken, in 1973 and their headquarters and factory are in Okayama, Japan.

OS Giken has established itself in the upper echelon for designing and manufacturing high quality, high performance, and supremely durable drivetrain parts.

All OS Giken parts are 100% manufactured and assembled in Japan, under very strict quality-control guidelines.