| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:13.98 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Breaststroke | 1:21.41 | Pan Am Open 2026 | 2026-02-21 |
| 100m Butterfly | 1:14.36 | Pan Am Open 2026 | 2026-02-21 |
| 100m Freestyle | 1:04.95 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 1500m Freestyle | 2:22.51 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Backstroke | 2:39.84 | MAC Jingle Bell | 2025-12-12 |
| 200m Breaststroke | 2:52.59 | Pan Am Open 2026 | 2026-02-21 |
| 200m Freestyle | 2:18.54 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:38.10 | Pan Am Open 2026 | 2026-02-21 |
| 400m Freestyle | 4:46.28 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m IM | 5:29.59 | Pan Am Open 2026 | 2026-02-21 |
| 50m Backstroke | 36.06 | MAC Jingle Bell | 2025-12-12 |
| 50m Butterfly | 33.27 | MAC Jingle Bell | 2025-12-12 |
| 50m Freestyle | 30.04 | MAC Jingle Bell | 2025-12-12 |
| 800m Freestyle | 9:47.28 | Pan Am Open 2026 | 2026-02-21 |
Kim, Ujun's top personal bests include 100m Backstroke (1:13.98), 100m Breaststroke (1:21.41), 100m Butterfly (1:14.36), 100m Freestyle (1:04.95), 1500m Freestyle (2:22.51).
Kim, Ujun swims for Markham Aquatic Club.
Kim, Ujun has competed in 11 meets.