The name of TOM'S comes from Tachi Oiwa Motor Sport. TOM's specialises in parts for Toyota vehicles released in Japan and are famous for the various Supra's that have competed at the highest level of the Japanese Touring Car Championships.

TOM'S was founded by Nobuhide Tachi, a former Toyota works driver and Kiyoshi Oiwa, who was engaged in sales of performance accessories for motor sports at a Toyota dealership in 1974.