KUMAGAI KENTA Qualifying Lap Time Records
| Lap Time | Racing Team | Racing Circuit | Race Car Model | Race Car Level | Year / Racing Series |
|---|---|---|---|---|---|
| 01:32.893 | Sportsland Sugo | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 01:33.114 | Sportsland Sugo | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 01:47.140 | Fuji International Speedway Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 01:47.382 | Fuji International Speedway Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 01:54.404 | Autopolis Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 01:54.446 | Autopolis Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 02:00.804 | Mobility Resort Motegi | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 02:01.871 | Mobility Resort Motegi | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 02:08.443 | Suzuka Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship | |
| 02:08.570 | Suzuka Circuit | Other MCS4-24 | Formula | 2025 Formula 4 Japanese Championship |