DOMESTIC
- YAMAHA MOTOR VIETNAM
- YAMAHA MOTOR ERECTRONIC VIETNAM
- TOYOTA MOTOR VIETNAM

OVERSEA
- YAMAHA MOTOR MANUFACTURING COPERATION OF AMERICA              
- AMERICAN HONDA MOTOR              
- KAWASAKI MOTORS MANUFACTURING              
- SUZUKI MANUFACTURING OF AMERICA              
- SUMIRIKO EASTEN RUBBER THAILAND              
- PROSPIRA (THAILAND)
- A&D COMPANY, LIMITED              
- KYOEI MANUFACTURING CO.,LTD