In 2012, LEON Racing first participated in the GT300 class of SUPER GT jointly with Hironori Takeuchi's SHIFT Team.

The team joined forces with by K2 R&D Co. Ltd., and fielded the number 62 Mercedes-Benz SLS AMG GT3 for Haruki Kurosawa and Masanobu Kato.

At the 6th race, the Suzuka 1000 km, they made a trick of pitting on the first lap, which turned out to be a good idea, and excellent pace allowed them to overtake Tsuchiya Engineering's VivaC 86 MC to win the race and take the top spot in the points rankings once again.

In 2018, the team entered the final race in 2nd place in the standings, but there was a 12-point difference from car No.

The conditions were tough, with the difference in points between 3rd place and lower, depending on the winning position and the No.

For 2019, the team originally keep their same winning line up, but Togo Suganami replaced Kurosawa for the last two rounds of the season.

[4] Takuro Shinohara transferred from Audi Team Hitotsuyama to K2 R&D LEON Racing, taking the place of Togo Suganami.