Sato made his single-seater debut with Honda Formula Dream Project in the 2018 FIA F4 Japanese Championship.

[citation needed] He took part in the 2019 French F4 Championship round at Circuit de Nevers Magny-Cours as a guest driver.

[citation needed] Sato would return to the Japanese circuit after just one season in Europe, competing in the 2021 Super Formula Lights championship with TODA Racing.

[citation needed] In the final race of the season at Fuji, Sato influenced the outcome of the GT500 class championship in controversial manner.

While racing the Subaru BRZ of Hideki Yamauchi for position, he went for an overtake into turn one, but braked too late and crashed into the GT500 class Stanley Honda NSX-GT of Naoki Yamamoto, who was in position to win the GT500 championship with 15 laps remaining.

[6] Sato took part in the Super Formula manufacturer and rookie test at Suzuka Circuit on 7-9 December, driving the number 15 Red Bull Mugen Team Goh car.

[8] Sato won Rookie of the Year honours ahead of his team mate, Atsushi Miyake, and recorded his first podium in the JAF Grand Prix Suzuka.