Teams and drivers
All teams use identical Dallara-built SF23 chassis with either Honda or Toyota engines. Every Honda-powered car uses a Honda HR-417E engine and every Toyota-powered car uses a Toyota TRD-01F engine.
| Entrant | Engine | No. | Driver name | Rounds |
|---|---|---|---|---|
 Kondo Racing [3] | Toyota | 3 | Kenta Yamashita [3] | 1–4 |
| 4 | Kazuto Kotaka [3] | 1–4 | ||
| Docomo Team Dandelion Racing [4] | Honda | 5 | Tadasuke Makino [4] | 1–4 |
| 6 | Kakunoshin Ohta [4] | 1–4 | ||
 Kids com Team KCMG [3] | Toyota | 7 | Kamui Kobayashi [3] | 1–4 |
| 8 | Nirei Fukuzumi [3] | 1–4 | ||
| ThreeBond Racing [4] | Honda | 12 | Atsushi Miyake [4] | 1–4 |
| docomo business ROOKIE [3] | Toyota | 14 | Kazuya Oshima [3] | 1–4 |
| Team Mugen [5] | Honda | 15 | Ayumu Iwasa [5] | 1–4 |
| 16 | Tomoki Nojiri [5] | 1–4 | ||
| Itochu Enex Team Impul [3] | Toyota | 19 |  Théo Pourchaire [3] | 1 |
 Ben Barnicoat [6] | 2 | |||
| Hibiki Taira [7] | 3–4 | |||
| 20 | Yuji Kunimoto [3] | 1–4 | ||
| Vantelin Team TOM’S [3] | Toyota | 36 | Sho Tsuboi [3] | 1–4 |
| 37 | Ukyo Sasahara [3] | 1–4 | ||
| Vertex Partners Cerumo・INGING [3] | Toyota | 38 | Sena Sakaguchi [3] | 1–4 |
| 39 | Toshiki Oyu [3] | 1–4 | ||
| San-Ei Gen with B-Max [4] [8] | Honda | 50 | Iori Kimura [4] | 1–4 |
| TGM Grand Prix [4] | Honda | 53 | "Juju" [4] [9] | 1–4 |
| 55 | Nobuharu Matsushita [10] | 1–3 | ||
| Hiroki Otsu [11] | 4 | |||
| PONOS Nakajima Racing [4] | Honda | 64 | Naoki Yamamoto [4] | 1–4 |
| 65 | Ren Sato [4] | 1–4 |
Team changes
- Cerumo-INGING acquired a new title sponsor in finance advisory firm Vertex Partners, and the team is now known as "Vertex Partners Cerumo-INGING". [3]
- Nakajima Racing acquired a new title sponsor in video game developer PONOS to replace Tata Consultancy Services (TCS), and the team is now known as "PONOS Nakajima Racing". [4]
- B-Max Racing Team downsized from running two cars in 2023 to a single-car entry in 2024. The team also gained a new title sponsor in food ingredient manufacturer San-Ei Gen, and is now known as "San-Ei Gen with B-Max". [8]
Driver changes
- Reigning champion Ritomo Miyata left the series and moved to Formula 2 and the European Le Mans Series in preparation to step up to the FIA World Endurance Championship with Toyota Gazoo Racing. [2] Miyata's replacement at Vantelin Team TOM'S was Sho Tsuboi, who spent the last five seasons at INGING, and was Miyata's co-driver in their 2023 Super GT GT500 class championship campaign. Ukyo Sasahara, who raced with TOM'S for the last three rounds of the 2023 season, returned on a full-time contract for 2024. Both drivers swapped numbers from the end of last season with Tsuboi driving the No. 36 car and Sasahara the No. 37 car. [3]
- Championship runner-up Liam Lawson also left the series to focus on his dual reserve driver role at Red Bull Racing and RB Formula One Team in Formula One. He was replaced at Team Mugen by fellow Red Bull Junior Team member Ayumu Iwasa, who returned to Japan to make his series debut. [5]
- Cerumo・INGING signed former Honda and TGM Grand Prix driver Toshiki Oyu to replace Sho Tsuboi. Sena Sakaguchi took over Tsuboi's old number 38, and Oyu was given the number 39. [3] [12]
- Itochu Enex Team Impul recruited an all-new lineup of 2023 FIA Formula 2 Champion Théo Pourchaire, who made his series debut as the only non-Japanese driver on the grid, and 2016 Super Formula champion Yuji Kunimoto, who had spent the last four seasons with KCMG. [3] Impul's former drivers left the series, with Ryō Hirakawa electing to focus on his new role as the reserve driver for McLaren in Formula One and Yuhi Sekiguchi joining KCMG as a reserve driver and team coordinator. [3] [13] [14]
- KCMG signed former Honda and ThreeBond Racing driver Nirei Fukuzumi to replace Yuji Kunimoto in the renumbered No. 8 entry, alongside team-mate Kamui Kobayashi. [3]
- TGM Grand Prix signed Juju Noda to drive its No. 53 car, replacing Toshiki Oyu. [3] [9] [4] Noda became the first Japanese woman and youngest driver to race in the history of the series, after spending 2023 in Euroformula Open, the Drexler-Automotive Formula Cup, and BOSS GP. Before the opening round of the season, TGM signed former B-Max Racing driver Nobuharu Matsushita to drive the No. 55 car. [10] Matsushita replaced Cem Bölükbaşı, who left the series after one year and went on to race in the European Le Mans Series for DKR Engineering.
- Atsushi Miyake rejoined Super Formula after a one-year absence, signing with ThreeBond Racing to replace Nirei Fukuzumi. [4]
- B-Max Racing Team recruited reigning Super Formula Lights champion Iori Kimura to drive the team's single No. 50 car. [4] Nobuharu Matsushita left B-Max after four seasons, and Raoul Hyman left after just one season in the No. 51 car.
Mid-season
- Théo Pourchaire signed a contract to join Arrow McLaren for the remainder of the 2024 IndyCar Series replacing David Malukas in April, departing Team Impul and Super Formula after just one race. [15] 2023 IMSA GTD Pro Champion and Toyota (Lexus Racing USA) works driver Ben Barnicoat replaced Pourchaire at Autopolis. [6] 2023 Super Formula Lights and Super GT - GT300 runner-up Hibiki Taira was announced to be filling the seat for the third and fourth round. [7] [16]
- Nobuharu Matsushita departed TGM Grand Prix after racing with them for the first three rounds. [17] Hiroki Otsu, who already deputized for the team for one round in 2023, returned to replace Matsushita for round 4. [11]
