Riona Tomishita

is a Japanese racing driver set to compete for Cerumo・INGING in Kyojo Cup.

Early career Karting Tomishita began karting in 2017, racing in various classes of the Reon Kart GP series, finishing second in Junior Cadet. Returning to the championship for 2018, she won the Frame 60 championship and was runner-up in Junior Cadet to Yuki Sudo. In the following year, Tomishita made her debut in the All-Japan Karting Championship, racing in the FP-Jr division, she scored her first podium at the Mogami River round by finishing second.

In 2021, Tomishita was selected as one of two drivers supported by Yamaha's Formula Blue KT program. She also stepped up to the FP-3 class of the All-Japan Karting Championship, taking a podium on debut at the Motegi round.

Kyojo Cup

2023 On 5 May 2023, it was announced that Tomishita would step up to Kyojo Cup with Kobe Toyopet's KTMS team. On her debut, Tomishita qualified on pole and ran in the top five in the first half of the race before retiring at the penultimate corner on lap eight. Across the rest of the season Tomishita scored a best result of fifth, in the second round. She finished sixth in the standings in her rookie season.

2024 Tomishita returned to KTMS and Kyojo Cup for 2024. In the second round, Tomishita scored her first points of the season by finishing seventh. In the second race of the only double header round of the season, Tomishita finished fourth, but was promoted to second after Miki Onaga and Rio Shimono were both given post-race penalties. After missing the third round of the season, Tomishita finished fourth on her return, but was promoted to second after race winner Rio Shimono and second-place finisher Mami Sakaue were both disqualified from the race. In the exhibition round held alongside Super Taikyu, Tomishita scored her first Kyojo Cup win in race two. In the final race of the season, Tomishita ran as high as second but dropped to fourth by the end. She finished fifth in the standings on 51 points.

2025 On 25 December 2024, it was announced that Tomishita would join Toyota-supported Cerumo・INGING ahead of her third season in Kyojo Cup. In her first season with Cerumo・INGING, Tomishita scored her maiden podiums by finishing third in both races of round three, before finishing third in the main race of the following round en route to a seventh-place points finish.

2026 Tomishita was retained by Cerumo・INGING for the 2026 season.

Other racing During 2025, Tomishita also raced for KTMS in the ST-2 class of the Super Taikyu Series alongside Tokiya Suzuki and Hibiki Taira. Winning on debut at Motegi, Tomishita then scored further wins at Autopolis and Okayama as well as two more podiums to end the year runner-up in the ST-2 class. The following year, Tomishita returned to KTMS for her sophomore season in Super Taikyu's ST-2 class, alongside Kiyoshi Umegaki and Rin Arakawa.

Karting record Karting career summary

Racing record Racing career summary

‡ Team standings

Complete Kyojo Cup results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)