In 2017, Tatsuya Kataoka launched a private team "T's Concept" for the purpose of training young and gentleman drivers.

T's Concept participated in the Super Taikyu ST-4 class with two Toyota 86's sponsored by Ogura Clutch.

T's Concept continued to field two cars for the 2018 season and signed Masahiro Sasaki to compete alongside Ogura in the #29 team while Tohjiro Azuma and Daisuke Matsunaga competed in the #28 team.

[1] One of the T's Concept cars was later rebranded into "ROOKIE Racing" in 2019 with Daisuke Toyota, son of Toyota president Akio, and former GT500 champion Akira Iida joining the team as Rookie's lead drivers in the 2019 Super Taikyu season.

Oshima stayed with the team, competing in both series and was paired up with Kenta Yamashita for 2021 Super GT season.