
Otsu endured a mostly difficult second season in Japan's top single-seater category with Dandelion Racing, having made the move from Team Mugen after earning Rookie of the Year honours in 2021.
Second place in the final race of the year at Suzuka left him ninth in the final standings, but that result wasn't enough to save his seat, with Honda instead promoting Super Formula Lights runner-up Kakunoshin Ota to partner Tadasuke Makino at Dandelion in 2023.