[citation needed] Yamashita began his racing car career in the 2012 Motegi Championship Formula Super FJ, which he won in his first season.

[3] In 2015, Yamashita continued to race in the All-Japan Formula Three Championship with TOM'S, he managed to clinch runners up, just lose out to Nick Cassidy the eventual champion.

[5] Yamashita then transferred to Lexus Team Wako's LeMans, replacing Felix Rosenqvist, who left Super GT to compete in the IndyCar Series.

He covered up for Heikki Kovalainen at Team SARD for Round 1 because Kovalalinen unable to enter Japan.

Yamashita then returns to the series full time in 2021 with new Rookie Racing with his former champion pair Oshima.

[8] Yamashita made his Super Formula debut in 2017 with Kondo Racing alongside his 2015 title rival Cassidy.

Yamashita reached the Hyperpole session in qualifying for the 2020 24 Hours of Le Mans before the team was forced to retire with a gearbox problem.