| # | Name | Team | Time | Date | Meet |
|---|---|---|---|---|---|
| 1 | Bailey Lello |
AUS | 1:00.11 | 12/16 | 2024 Queensland Championships
Brisbane, AUS |
| 1 | HAYATO WATANABE |
JPN | 1:00.11 | 11/29 | 2024 Japan Open
Tokyo, JPN |
| 3 | Max Morgan |
GBR | 1:00.18 | 12/01 | Rotterdam Qualification Meet 2024
Rotterdam, NED |
| 4 | YU HANAGURUMA |
JPN | 1:00.19 | 11/29 | 2024 Japan Open
Tokyo, JPN |
| 5 | IPPEI WATANABE |
JPN | 1:00.35 | 11/29 | 2024 Japan Open
Tokyo, JPN |
| 6 | YAMATO FUKASAWA |
JPN | 1:00.37 | 11/29 | 2024 Japan Open
Tokyo, JPN |
| 7 | KOHEI HONDA |
JPN | 1:00.94 | 11/29 | 2024 Japan Open
Tokyo, JPN |
