He won the TCR Japan Saturday and Sunday Series in 2020,[1] racing for Audi Team Hitotsuyama.

Shinohara made his debut in the series in 2020 with X Works partnered with Hong Kong driver Shaun Thong.

Shinohara competed full time for 2021 with Audi Team Hitotsuyama alongside Shintaro Kawabata.

Shinohara then moved to K2 R&D LEON Racing, replacing Togo Suganami.

This biographical article related to Japanese auto racing is a stub.