swimKo Yamamoto
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.36 | AAA+0.77s to AAAA·+3.07s to Sectionals | 2026-03-22 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 100 Freestyle | SCY | 54.82 | AAA+1.13s to AAAA·+6.53s to Sectionals | 2026-03-20 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 200 Freestyle | SCY | 1:58.65 | AAA+1.66s to AAAA·+12.86s to Sectionals | 2026-03-21 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 500 Freestyle | SCY | 5:24.84 | AAA+9.85s to AAAA·+38.75s to Sectionals | 2026-03-20 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 50 Backstroke | SCY | 29.45 | AAA+1.26s to AAAA·+3.76s to Sectionals | 2026-03-21 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 100 Backstroke | SCY | 1:09.26 | A+3.27s to AA·+14.17s to Sectionals | 2025-03-22 | 2025 IN Swimming Age Group Short Course Champvenue |
| 50 Breaststroke | SCY | 35.05 | A+0.06s to AA·+5.56s to Sectionals | 2026-03-07 | 2026 Spring SE ISI Divisional Championships -venue |
| 100 Breaststroke | SCY | 1:15.44 | A+0.55s to AA·+12.75s to Sectionals | 2026-03-08 | 2026 Spring SE ISI Divisional Championships -venue |
| 100 Butterfly | SCY | 1:05.92 | A+0.03s to AA·+13.23s to Sectionals | 2026-03-07 | 2026 Spring SE ISI Divisional Championships -venue |
| 200 Individual Medley | SCY | 2:17.80 | AAA+5.71s to AAAA·+18.41s to Sectionals | 2026-03-22 | 2026 IN Swimming Age Group Short Course Champfast pool |
| 50 Freestyle | LCM | 28.68 | AAA+0.59s to AAAA·+3.09s to Sectionals | 2026-05-30 | 2026 Duel in the Poolvenue |
| 100 Freestyle | LCM | 1:01.86 | AAA+0.27s to AAAA·+6.57s to Sectionals | 2026-01-01 | DePauw University |
| 200 Freestyle | LCM | 2:13.77 | AAAA·+12.88s to Sectionals | 2026-05-30 | 2026 Duel in the Pool |
| 400 Freestyle | LCM | 4:52.97 | AAA+7.08s to AAAA·+33.88s to Sectionals | 2026-01-01 | DePauw University |
| 50 Backstroke | LCM | 39.47 | BB+1.68s to A·+9.28s to Sectionals | 2024-07-12 | 2024 IN Swimming Swimfestvenue |
| 100 Backstroke | LCM | 1:27.86 | BB+5.97s to A·+23.37s to Sectionals | 2023-07-21 | 2023 IN Swimming AGS Entries |
| 100 Breaststroke | LCM | 1:41.15 | B+1.56s to BB·+28.76s to Sectionals | 2024-07-14 | 2024 IN Swimming Swimfestvenue |
| 50 Butterfly | LCM | 38.82 | B+0.13s to BB·+11.03s to Sectionals | 2024-07-14 | 2024 IN Swimming Swimfestvenue |
| 100 Butterfly | LCM | 1:31.05 | B+3.76s to BB·+30.56s to Sectionals | 2024-07-13 | 2024 IN Swimming Swimfestvenue |
| 200 Individual Medley | LCM | 3:07.67 | BB+13.48s to A·+49.98s to Sectionals | 2024-07-13 | 2024 IN Swimming Swimfestvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
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.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.01 | flying | 200 Free Relay (leg 2) | 2026-03-22 | 2026 IN Swimming Age Group Short Course Champ |
| 50 Backstroke | SCY | 29.58 | flat | 200 Medley Relay | 2026-03-21 | 2026 IN Swimming Age Group Short Course Champ |
| 50 Freestyle | LCM | 33.31 | flying | 200 Free Relay (leg 4) | 2024-07-12 | 2024 IN Swimming Swimfest |
| 50 Butterfly | LCM | 38.73 | flying | 200 Medley Relay (leg 3) | 2024-07-13 | 2024 IN Swimming Swimfest |
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 11-12 · SCY
3869 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:24.84 | 911 |
| 100 BK SCY | 1:09.26 | 633 |
| 100 BR SCY | 1:15.44 | 725 |
| 100 FL SCY | 1:05.92 | 720 |
| 200 IM SCY | 2:17.80 | 880 |
IMR 11-12 · LCM
2566 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:13.77 | 1013 |
| 50 BK LCM | 39.47 | 562 |
| 50 FL LCM | 38.82 | 475 |
| 200 IM LCM | 3:07.67 | 516 |
| 50 BR LCM | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 54.82
Front half 26.34s · back half 28.48s
200 Freestyle SCY 1:58.65
Front half 58.28s · back half 60.37s
500 Freestyle SCY 5:24.84
Front half 159.57s · back half 165.27s
100 Backstroke SCY 1:09.26
Front half 33.11s · back half 36.15s
100 Breaststroke SCY 1:15.44
Front half 35.65s · back half 39.79s
200 Individual Medley SCY 2:17.80
Front half 64.50s · back half 73.30s
100 Freestyle LCM 1:01.86 split/total mismatch
Front half 29.65s · back half 32.21s
200 Freestyle LCM 2:13.77 split/total mismatch
400 Freestyle LCM 4:52.97 split/total mismatch
100 Breaststroke LCM 1:41.15
Front half 49.12s · back half 52.03s
100 Butterfly LCM 1:31.05
Front half 42.59s · back half 48.46s
200 Individual Medley LCM 3:07.67
Front half 88.68s · back half 98.99s
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.