| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Daiya SETO | 200 S Fly | Finals | 1:49.97 |
| 2 | Daiya SETO | 400 S IM | Finals | 3:59.24 |
| 3 | Junya Koga | 100 S Back | Finals | 50.21 |
| 4 | Junya Koga | 50 S Back | Semifinals | 22.81 |
| 5 | Daiya SETO | 100 S IM | Finals | 52.01 |
| 6 | Junya Koga | 100 S Back | Finals | 50.26 |
| 7 | Junya Koga | 50 S Back | Finals | 22.85 |
| 8 | Daiya SETO | 100 S IM | Semifinals | 52.09 |
| 9 | Shinri SHIOURA | 100 S IM | Finals | 52.17 |
| 10 | Daiya SETO | 200 S IM | Finals | 1:52.89 |
| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Japan (B) | 800 S Free Relay | Finals | |
| 2 | Japan | 800 S Free Relay | Prelims | |
| 3 | Japan (B) | 200 S Free Relay | Finals | |
| 4 | Japan (B) | 200 S Medley Relay | Finals | |
| 5 | Japan (B) | 400 S Medley Relay | Finals | |
| 6 | Japan | 200 S Free Relay | Prelims | |
| 7 | Japan (B) | 400 S Free Relay | Finals | |
| 8 | Japan | 200 S Medley Relay | Prelims | |
| 9 | Japan | 400 S Medley Relay | Prelims | |
| 10 | Japan | 400 S Free Relay | Prelims | |
| Name | Gold | Silver | Bronze | Score | FINA | |
|---|---|---|---|---|---|---|
| 1 | Daiya SETO | 1 | 1 | 3 | – | 904.8 |
| 2 | Junya Koga | 1 | 0 | 2 | – | 921.6 |
| 3 | Shinri SHIOURA | 0 | 1 | 3 | – | 865.6 |
| 4 | Takeshi KAWAMOTO | 0 | 0 | 1 | – | 892.0 |
| 5 | Masaki KANEKO | 0 | 0 | 1 | – | 878.7 |
