| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Daiya SETO | 200 S Breast | Finals | 2:00.35 |
| 2 | Daiya SETO | 400 S IM | Finals | 3:55.75 |
| 3 | Daiya SETO | 200 S Fly | Finals | 1:49.22 |
| 4 | Daiya SETO | 200 S Fly | Prelims | 1:49.99 |
| 5 | Daiya SETO | 200 S IM | Finals | 1:51.39 |
| 6 | TEPPEI MORIMOTO | 200 S Fly | Prelims | 1:50.26 |
| 7 | Daiya SETO | 200 S Breast | Prelims | 2:02.43 |
| 8 | Katsuhiro MATSUMOTO | 200 S Free | Prelims | 1:41.29 |
| 9 | Daiya SETO | 200 S IM | Prelims | 1:51.76 |
| 10 | IPPEI WATANABE | 200 S Breast | Finals | 2:02.53 |
| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Japan (A) | 200 S Medley Relay | Finals | |
| 2 | Japan (A) | 800 S Free Relay | Finals | |
| 3 | Japan (A) | 400 S Medley Relay | Finals | |
| 4 | Japan (A) | 800 S Free Relay | Prelims | |
| 5 | Japan (A) | 400 S Medley Relay | Prelims | |
| 6 | Japan (A) | 200 S Free Relay | Finals | |
| 7 | Japan (A) | 400 S Free Relay | Finals | |
| 8 | Japan (A) | 200 S Medley Relay | Prelims | |
| 9 | Japan (A) | 200 S Free Relay | Prelims | |
| 10 | Japan (A) | 400 S Free Relay | Prelims | |
| Name | Gold | Silver | Bronze | Score | FINA | |
|---|---|---|---|---|---|---|
| 1 | Daiya SETO | 2 | 1 | 0 | 11 | 977.3 |
| 2 | TEPPEI MORIMOTO | 0 | 0 | 0 | – | 946.0 |
| 3 | IPPEI WATANABE | 0 | 0 | 0 | – | 925.0 |
| 4 | Shogo TAKEDA | 0 | 0 | 0 | – | 913.3 |
| 5 | So OGATA | 0 | 0 | 0 | – | 912.0 |
