Teams and drivers
All teams used identical Dallara-built SF23 chassis with either Honda or Toyota engines. Every Honda-powered car used a Honda HR-417E engine and every Toyota-powered car used a Toyota TRD-01F engine.
| Entrant | Engine | No. | Driver name | Rounds |
|---|---|---|---|---|
 Vantelin Team TOM’S | Toyota | 1 | Sho Tsuboi [2] | 1–2 |
| 37 |  Sacha Fenestraz | 1–2 | ||
| Kondo Racing | Toyota | 3 | Kenta Yamashita [2] | 1–2 |
| 4 |  Zak O'Sullivan | 1–2 | ||
| Docomo Team Dandelion Racing | Honda | 5 | Tadasuke Makino [3] | 1–2 |
| 6 | Kakunoshin Ohta [3] | 1–2 | ||
 Kids com Team KCMG | Toyota | 7 | Kamui Kobayashi [2] | 1–2 |
| 8 | Nirei Fukuzumi [2] | 1–2 | ||
| Hazama Ando Triple Tree Racing | Honda | 10 | ”Juju” | 1–2 |
| ThreeBond Racing | Honda | 12 | Atsushi Miyake [3] | 1–2 |
| docomo business ROOKIE | Toyota | 14 | Kazuya Oshima [2] | 1–2 |
| Team Mugen | Honda | 15 | Ayumu Iwasa [3] | 1–2 |
| 16 | Tomoki Nojiri [3] | 1–2 | ||
| Itochu Enex Wecars Team Impul | Toyota | 19 |  Oliver Rasmussen | 1–2 |
| 20 | Mitsunori Takaboshi | 1–2 | ||
| KDDI TGMGP TGR-DC | Toyota | 28 | Kazuto Kotaka | 1–2 |
| 29 | Hibiki Taira | 1–2 | ||
| Sanki Vertex Partners Cerumo・INGING | Toyota | 38 | Sena Sakaguchi [2] | 1–2 |
| 39 | Toshiki Oyu [2] | 1–2 | ||
| San-Ei Gen with B-Max | Honda | 50 | Syun Koide | 1–2 |
| PONOS Nakajima Racing | Honda | 64 | Ren Sato [3] | 1–2 |
| 65 |  Igor Omura Fraga | 1–2 |
Team changes
- The entry co-run by Inging Motorsport and Cerumo added another title sponsor alongside Vertex Partners, with Industrial manufacturer Sanki Shokai joining the series and the team competing under the name Sanki Vertex Partners Cerumo・INGING. [4]
- TGM Grand Prix changed both their name and their engine supplier. The team will no longer run Honda engines and instead now join ROOKIE racing in serving as Toyota Gazoo Racing's junior team, TGR-DC. The team also acquired a new title sponsor in telecommunications operator KDDI, with the team entering the 2025 season under the name KDDI TGMGP TGR-DC. [2]
- A new team will enter the championship in Triple Tree Racing, established by Hideki Noda, former Formula One and father of Juju Noda. It will use Honda engines and will be operated by motorsport management company 4Minutes. Construction company Hazama Ando was confirmed to be the entry's title sponsor, with the team running under the name Hazama Ando Triple Tree Racing. [5]
- Red Bull ended their partnership with Team Mugen after seven years of cooperation. [6]
- Team Impul added another title sponsor in Itochu's subsidiary company, used car dealer Wecars, with the team competing under the name Itochu Enex Wecars Team Impul. [7]
Driver changes
- Nakajima Racing saw three-time series champion Naoki Yamamoto retire from the series after 15 seasons. [8] The team promoted their reserve driver Igor Fraga, who spent 2024 competing in Super GT's GT300 class with Anest Iwata Racing with Arnage. [3]
- Team Impul will have an all-new line up as 2016 series champion Yuji Kunimoto retired from the series after 14 seasons and neither of the four drivers who drove the No. 19 car in 2024 returned. [9] The team signed Oliver Rasmussen, who came 19th in the WEC's Hypercar class with Jota Sport in 2024 and will make his series debut, and NISMO works driver Mitsunori Takaboshi, who will make his full-season debut after a one-off Super Formula appearance for Team Impul in 2021. [2]
- B-Max Racing Team saw Iori Kimura leave the team after Honda ended its association with him, as he moves to Super Taikyu Series ST-X class with Team Handwork Challenge. [10] [11] The team promoted reigning Super Formula Lights champion Syun Koide from its outfit in that championship. [3]
- TOM'S saw Ukyo Sasahara leave the series after five years and three full-time seasons to focus on his Super GT GT500 efforts with TGR Team Deloitte TOM'S. 2022 Super Formula runner-up Sacha Fenestraz returned to the series after a two-year stint in Formula E with Nissan to replace him. [2]
- Kondo Racing replaced TGMGP TGR-DC-bound Kazuto Kotaka with former Williams Academy driver Zak O'Sullivan, who moves to Japan after coming 16th in Formula 2 with ART Grand Prix. [2]
- Newly rebranded team TGMGP TGR-DC also took on two new drivers as Juju Noda and Hiroki Otsu both left the team following its switch from Honda to Toyota engines, with Noda switching to the new Triple Tree Racing team and Otsu electing to focus on his Super GT GT500 efforts with ARTA. Kazuto Kotaka joins the team after coming 14th with Kondo Racing in his second Super Formula season in 2024. Hibiki Taira, who drove Team Impul's No. 19 car on four occasions in 2024, will complete TGMGP TGR-DC's lineup on his full-time debut in the series. [2]
- Juju Noda joins the new Triple Tree Racing team for her second season in the championship after finishing her debut season with TGM Grand Prix in 21st. [5]
