Kaisei Ishikubo
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.54 | BB+0.85s to A·+2.35s to Sectionals | 2026-03-29 | LAMV C/B/A+ Meetvenue |
| 100 Freestyle | SCY | 57.33 | BB+3.04s to A·+6.34s to Sectionals | 2026-01-25 | Orinda Aquatics SCY Senior Open Meetvenue |
| 200 Freestyle | SCY | 2:05.03 | BB+6.44s to A·+13.24s to Sectionals | 2026-02-15 | 2026 SI Presidents' Day Senior Classic - copivenue |
| 500 Freestyle | SCY | 5:46.82 | BB+24.23s to A·+44.13s to Sectionals | 2026-03-28 | LAMV C/B/A+ Meetvenue |
| 50 Backstroke | SCY | 32.31 | B+2.02s to BB·+8.62s to Futures | 2026-02-16 | 2026 SI Presidents' Day Senior Classic - copivenue |
| 100 Backstroke | SCY | 1:11.86 | +2.37s to B·+16.37s to Sectionals | 2025-01-18 | 2025 Thunderbolt Round Robin Invitationalvenue |
| 200 Backstroke | SCY | 2:35.11 | +3.32s to B·+33.82s to Sectionals | 2025-01-18 | 2025 Thunderbolt Round Robin Invitationalvenue |
| 50 Breaststroke | SCY | 33.00 | BB+0.91s to A·+6.71s to Futures | 2026-02-15 | 2026 SI Presidents' Day Senior Classic - copivenue |
| 100 Breaststroke | SCY | 1:07.34 | A+2.75s to AA·+4.15s to Sectionals | 2026-03-29 | LAMV C/B/A+ Meetvenue |
| 200 Breaststroke | SCY | 2:28.72 | BB+1.73s to A·+11.43s to Sectionals | 2026-02-16 | 2026 SI Presidents' Day Senior Classic - copivenue |
| 50 Butterfly | SCY | 31.85 | B+1.76s to BB·+8.96s to Futures | 2026-02-14 | 2026 SI Presidents' Day Senior Classic - copivenue |
| 100 Butterfly | SCY | 1:10.07 | +1.38s to B·+14.88s to Sectionals | 2026-01-24 | Orinda Aquatics SCY Senior Open Meetvenue |
| 200 Individual Medley | SCY | 2:20.80 | BB+8.61s to A·+16.81s to Sectionals | 2026-03-28 | LAMV C/B/A+ Meetvenue |
| 400 Individual Medley | SCY | 5:06.07 | BB+21.88s to A·+41.38s to Sectionals | 2026-05-10 | 2026 Post-CCS SR Walk-On Meetvenue |
| 50 Freestyle | LCM | 28.70 | BB+0.11s to A·+1.71s to Sectionals | 2026-07-11 | Pacific Swimming Long Course Senior Openvenue |
| 100 Freestyle | LCM | 1:04.48 | BB+2.19s to A·+5.49s to Sectionals | 2026-06-13 | 2026 DACA LC CBA Meetvenue |
| 200 Freestyle | LCM | 2:22.32 | BB+5.13s to A·+13.63s to Sectionals | 2026-06-28 | Pacific Swimming Long Course Senior Openvenue |
| 400 Freestyle | LCM | 4:57.46 | BB+5.37s to A·+23.07s to Sectionals | 2026-07-11 | Pacific Swimming Long Course Senior Openvenue |
| 800 Freestyle | LCM | 10:27.42 | BB+23.53s to A·+57.43s to Sectionals | 2026-07-10 | Pacific Swimming Long Course Senior Openvenue |
| 100 Backstroke | LCM | 1:25.82 | +4.63s to B·+20.63s to Sectionals | 2025-06-22 | 2025 FDST June A/B Modified LC Invitationalvenue |
| 200 Backstroke | LCM | 2:52.97 | B+9.28s to BB·+31.48s to Sectionals | 2025-06-21 | Fresno Dolphins Swim Team A/B Modified Long Course Invitational |
| 50 Breaststroke | LCM | 34.07 | AA+0.58s to AAA·+3.18s to Futures | 2026-07-11 | Pacific Swimming Long Course Senior Openvenue |
| 100 Breaststroke | LCM | 1:14.13 | AA+2.34s to AAA·+0.43s to Sectionals | 2026-07-12 | Pacific Swimming Long Course Senior Openvenue |
| 200 Breaststroke | LCM | 2:41.31 | AA+4.22s to AAA·+0.43s to Sectionals | 2026-07-10 | Pacific Swimming Long Course Senior Openvenue |
| 100 Butterfly | LCM | 1:17.61 | B+4.72s to BB·+14.52s to Sectionals | 2026-05-17 | 2026 DACA LC CBA+venue |
| 200 Individual Medley | LCM | 2:33.07 | A+6.18s to AA·+8.38s to Sectionals | 2026-07-12 | Pacific Swimming Long Course Senior Openvenue |
| 400 Individual Medley | LCM | 5:38.04 | BB+8.75s to A·+30.25s to Sectionals | 2026-06-12 | 2026 DACA LC CBA Meetvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 15.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.07 | flying | 200 Free Relay (leg 2) | 2026-02-15 | 2026 SI Presidents' Day Senior Classic - copi |
| 50 Breaststroke | SCY | 30.73 | flying | 200 Medley Relay (leg 2) | 2026-02-16 | 2026 SI Presidents' Day Senior Classic - copi |
| 100 Breaststroke | SCY | 1:10.07 | flying | 400 Medley Relay (leg 2) | 2025-01-19 | 2025 Thunderbolt Round Robin Invitational |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 15-16 · LCM
2968 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:57.46 | 597 |
| 200 BK LCM | 2:52.97 | 416 |
| 200 BR LCM | 2:41.31 | 739 |
| 200 IM LCM | 2:33.07 | 642 |
| 400 IM LCM | 5:38.04 | 574 |
| 200 FL LCM | — | 0 |
IMR 15-16 · LCM
2686 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:22.32 | 562 |
| 100 BK LCM | 1:25.82 | 333 |
| 100 BR LCM | 1:14.13 | 741 |
| 100 FL LCM | 1:17.61 | 408 |
| 200 IM LCM | 2:33.07 | 642 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 57.33
Front half 28.12s · back half 29.21s
200 Freestyle SCY 2:05.03
Front half 59.53s · back half 65.50s
500 Freestyle SCY 5:46.82
Front half 172.16s · back half 174.66s
100 Backstroke SCY 1:11.86
Front half 35.68s · back half 36.18s
200 Backstroke SCY 2:35.11
Front half 75.98s · back half 79.13s
100 Breaststroke SCY 1:07.34
Front half 32.60s · back half 34.74s
200 Breaststroke SCY 2:28.72
Front half 72.49s · back half 76.23s
100 Butterfly SCY 1:10.07
Front half 32.61s · back half 37.46s
200 Individual Medley SCY 2:20.80
Front half 70.21s · back half 70.59s
400 Individual Medley SCY 5:06.07
Front half 151.65s · back half 154.42s
200 Freestyle LCM 2:22.32
Front half 70.80s · back half 71.52s
400 Freestyle LCM 4:57.46
Front half 148.45s · back half 149.01s
800 Freestyle LCM 10:27.42
Front half 308.55s · back half 318.87s
100 Backstroke LCM 1:25.82
Front half 42.84s · back half 42.98s
200 Backstroke LCM 2:52.97 split/total mismatch
100 Breaststroke LCM 1:14.13
Front half 34.99s · back half 39.14s
200 Breaststroke LCM 2:41.31
Front half 78.20s · back half 83.11s
200 Individual Medley LCM 2:33.07
Front half 77.02s · back half 76.05s
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.