Itsuki Sato | |
|---|---|
佐藤樹 | |
| Born | Itsuki Sato 3 December 2002 Kanagawa Prefecture, Japan |
| Nationality | |
| F4 Japanese Championship career | |
| Debut season | 2022 |
| Current team | HYDRANGEA Kageyama Racing |
| Car number | 17 |
| Former teams | Rn-sports, HELM Motorsports, Drago Corse |
| Starts | 46 |
| Wins | 5 |
| Podiums | 11 |
| Poles | 3 |
| Fastest laps | 7 |
| Best finish | 2nd in 2025 |
| Championship titles | |
| 2022 2021 | JAF Japan Formula 4 Motegi and Sugo FJ Championship |
| Statistics up to date as of December 1, 2026. | |
Itsuki Sato (佐藤 樹, Satō Itsuki; born 3 December 2002) is a Japanese racing driver who last competed in the F4 Japanese Championship for HYDRANGEA Kageyama Racing and Porsche Carrera Cup Japan as a Porsche Japan junior driver.
Sato began karting at the age of three, mainly racing in Rotax-run championships across Japan. Most of Sato's early career was spent with Super Chips Racing Service, with whom he finished runner-up with in the 2013 Mobara West Cup's Mini Rok standings, staying with them until his first year in Senior Rotax in 2017.
Sato then moved to HRS Japan from 2018 onwards, most notably finishing third in both the 2019 RMC Japan Festival and the 2020 Kart Race In Suzuka series and also briefly competed in Europe by competing in the Rotax Max Euro Trophy in 2019.
Stepping up to single-seaters in 2021, Sato competed in the Motegi and Sugo FJ Series for RiNoA Racing Project. Sato won four races to clinch the title by 25 points over Shinnosuke Ito at the penultimate round at Motegi.
Sato moved to Formula Beat for 2022, in which he missed the round at Tokachi but clinched the title at the season-ending Suzuka round after winning all but three races he contested. During 2022 Sato made two one-off appearances in Japanese F4, racing for Rn-sports in the season-opening round at Fuji and HELM Motorsports at Sugo, taking a best result of 14th in the latter round. Sato was also one of four finalists in the Honda Racing School Suzuka Circuit, alongside Tosei Moriyama, Hironobu Shimizu and Shuma Shimakage.
Following his Formula Beat title, Sato remained with HELM Motorsports to race in Japanese F4 full-time in 2023. In his first full season in the series, Sato took a best result of sixth twice, scored at both Fuji and Suzuka, en route to 13th in points.
In 2024, Sato switched to Drago Corse as he remained in Japanese F4 for his sophomore season. In his second season in Japanese F4, Sato scored his maiden series podium at Fuji, which helped him to finish 12th in the overall standings at season's end.
Sato returned to Japanese F4, switching to HYDRANGEA Kageyama Racing for his third full season in the series, while he also competing in Porsche Carrera Cup Japan as Porsche Japan's junior driver. In the former, Sato began the season with a podium in race two at Fuji before taking his maiden series win in race three, and following that up by winning both races in the second Fuji round. Sato then scored wins at Suzuka and Sugo as well as four more podiums to end the year runner-up in points. During 2025, Sato also raced in the FIA F4 World Cup, and made a one-off appearance in the F4 Indian Championship at Kari, in which he won twice.
After not racing for much of 2026, Sato joined Bionic Jack Racing to contest the final round of that year's Porsche Carrera Cup Japan season at Fuji, finishing fifth in both races.
| Season | Series | Team | Position |
|---|---|---|---|
| 2010 | HarunaCup KartRace – Koma 60 | Super Chips | |
| 2011 | HarunaCup KartRace – Koma 60 | Super Chips | |
| 2012 | Mobara West Cup – Mini Rok | Super Chips | 5th |
| 2013 | Rotax Max Challenge Japan – Max Cadet | Super Chips | 37th |
| Mobara West Cup – Mini Rok | 2nd | ||
| 2014 | Motegi Kart Race – Yamaha Cadet Open | Super Chips | 8th |
| 2017 | Rotax Max Challenge Japan – Senior Max | Super Chips | 37th |
| Rotax Max Challenge Japan Festival – Senior Max | DNQ | ||
| Rotax Max Challenge Japan Festival – XPS Cup | 19th | ||
| 2018 | Rotax Max Challenge Mizunami Series – Senior Max | HRS Japan | 9th |
| Kart Race In Suzuka – Senior Max | 20th | ||
| Rotax Max Challenge Japan – Senior Max | 36th | ||
| Rotax Max Challenge Japan Festival – Senior Max | 28th | ||
| 2019 | Rotax Max Euro Trophy – Senior Max | Daems Racing Team | 47th |
| Rotax Max Challenge Mizunami Series – Senior Max | HRS Japan | 10th | |
| Kart Race In Suzuka – Senior Max | 5th | ||
| Rotax Max Challenge Japan – Senior Max | 32nd | ||
| Rotax Max Challenge Japan Festival – Senior Max | 3rd | ||
| 2020 | Kart Race In Suzuka – Senior Max | HRS Japan | 3rd |
| Rotax Max Challenge Mizunami Series – Senior Max | 8th | ||
| Rotax Max Challenge Japan – Senior Max | 18th | ||
| Rotax Max Challenge Japan Festival – Senior Max | 4th | ||
| 2021 | Rotax Max Challenge Mizunami Series – Senior Max | HRS Japan | 13th |
| Rotax Max Challenge Japan – Senior Max | 43rd | ||
| Rotax Max Challenge Japan Festival – Senior Max | DNQ | ||
| Sources: | |||
| Season | Series | Team | Races | Wins | Poles | FLaps | Podiums | Points | Position |
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Motegi and Sugo FJ Championship | RiNoA Racing Project | 5 | 4 | 5 | 2 | 5 | 100 | 1st |
| 2022 | JAF Japan Formula 4 | Marusan Mist | 10 | 7 | 5 | 7 | 10 | 182 | 1st |
| F4 Japanese Championship | Rn-sports | 2 | 0 | 0 | 0 | 0 | 0 | 25th | |
| HELM Motorsports | 2 | 0 | 0 | 0 | 0 | ||||
| 2023 | F4 Japanese Championship | HELM Motorsports | 14 | 0 | 0 | 0 | 0 | 27 | 13th |
| 2024 | F4 Japanese Championship | Drago Corse | 14 | 0 | 0 | 0 | 1 | 37 | 12th |
| 2025 | F4 Japanese Championship | HYDRANGEA Kageyama Racing | 14 | 5 | 3 | 7 | 10 | 212.5 | 2nd |
| Porsche Carrera Cup Japan | Porsche Japan | 11 | 0 | 0 | 0 | 0 | 117 | 6th | |
| F4 Indian Championship | Ahmedabad Apex Racers | 4 | 2 | 1 | 1 | 3 | 63 | 7th | |
| FIA F4 World Cup | 1 | 0 | 0 | 0 | 0 | N/a | DNF | ||
| 2026 | Porsche Carrera Cup Japan | Bionic Jack Racing | 2 | 0 | 0 | 0 | 0 | 24 | 13th |
| Source: | |||||||||
(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)
| Year | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | DC | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | Rn-sports | FUJ1 1 21 |
FUJ1 2 18 |
SUZ 1 |
SUZ 2 |
FUJ2 1 |
FUJ2 2 |
SUZ2 1 |
SUZ2 2 |
25th | 0 | ||||||
| HELM Motorsports | SUG 1 14 |
SUG 2 15 |
AUT 1 |
AUT 2 |
MOT 1 |
MOT 2 | |||||||||||
| 2023 | HELM Motorsports | FUJ1 1 28 |
FUJ1 2 6 |
SUZ 1 6 |
SUZ 2 13 |
FUJ2 1 9 |
FUJ2 2 9 |
SUZ2 1 10 |
SUZ2 2 11 |
SUG 1 9 |
SUG 2 12 |
AUT 1 12 |
AUT 2 11 |
MOT 1 9 |
MOT 2 9 |
13th | 27 |
| 2024 | Drago Corse | FUJ1 1 Ret |
FUJ1 2 3 |
SUZ 1 10 |
SUZ 2 11 |
FUJ2 1 9 |
FUJ2 2 10 |
SUG 1 11 |
SUG 2 12 |
AUT 1 10 |
MOT 1 8 |
MOT 2 10 |
MOT 3 5 |
SUZ2 1 13 |
SUZ2 2 9 |
12th | 37 |
| 2025 | HYDRANGEA Kageyama Racing | FUJ1 1 11 |
FUJ1 2 2 |
FUJ1 3 1 |
FUJ2 1 1 |
FUJ2 2 1 |
SUZ 1 1 |
SUZ 2 2 |
SUG 1 2 |
SUG 2 2 |
SUG 3 1 |
AUT 1 2 |
AUT 2 5 |
MOT 1 Ret |
MOT 2 14 |
2nd | 212.5 |
(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)
| Year | Entrant | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Pos | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | Ahmedabad Apex Racers | KAR1 1 |
KAR1 2 |
MAD1 1 |
MAD1 2 |
MAD1 3 |
MAD1 4 |
KAR2 1 1 |
KAR2 2 3 |
KAR2 3 1 |
KAR2 4 7 |
KAR3 1 |
KAR3 2 |
KAR3 3 |
MAD2 1 |
MAD2 2 |
7th | 63 |
| Year | Car | Qualifying | Quali Race | Main Race |
|---|---|---|---|---|
| 2025 | Mygale M21-F4 | 14th | 8th | DNF |