swimKenshin Yokoyama
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 29.78 | A+0.99s to AA | 2025-12-12 | 2025 PN 14&Under Short Course Champs-Approved venue |
| 100 Freestyle | SCY | 1:08.19 | BB+3.00s to A | 2026-01-24 | 2026 PN WAVE Winter Invitational- Approved fast pool |
| 200 Freestyle | SCY | 2:26.79 | BB+4.00s to A | 2026-06-21 | 2026 PN SRST Summer Invitational - Approved venue |
| 500 Freestyle | SCY | 5:27.74 | AAAA | 2025-11-23 | 2025 PN Nov. AGI, Division 2 (SMAC) |
| 50 Backstroke | SCY | 34.02 | A+0.63s to AA | 2026-01-24 | 2026 PN WAVE Winter Invitational- Approved fast pool |
| 100 Backstroke | SCY | 1:17.58 | BB+1.99s to A | 2026-06-20 | 2026 PN SRST Summer Invitational - Approved venue |
| 200 Backstroke | SCY | 2:41.91 | BB+1.12s to A | 2026-06-21 | 2026 PN SRST Summer Invitational - Approved venue |
| 50 Breaststroke | SCY | 39.48 | A+1.79s to AA | 2026-01-25 | 2026 PN WAVE Winter Invitational- Approved fast pool |
| 100 Breaststroke | SCY | 1:25.31 | BB+0.32s to A | 2026-03-19 | 2026 Northwest Region Age Group Championships |
| 200 Breaststroke | SCY | 3:04.28 | BB+0.69s to A | 2026-01-25 | 2026 PN WAVE Winter Invitational- Approved fast pool |
| 50 Butterfly | SCY | 31.81 | AA+1.32s to AAA | 2025-12-13 | 2025 PN 14&Under Short Course Champs-Approved venue |
| 100 Butterfly | SCY | 1:15.25 | A+3.36s to AA | 2025-12-14 | 2025 PN 14&Under Short Course Champs-Approved venue |
| 200 Butterfly | SCY | 2:47.22 | BB+2.83s to A | 2026-06-20 | 2026 PN SRST Summer Invitational - Approved venue |
| 100 Individual Medley | SCY | 1:15.91 | BB+0.62s to A | 2025-12-14 | 2025 PN 14&Under Short Course Champs-Approved venue |
| 200 Individual Medley | SCY | 2:41.38 | A+4.89s to AA | 2026-03-21 | 2026 NW Region Age Group Champs- Approved venue |
| 400 Individual Medley | SCY | 5:38.52 | A+8.73s to AA | 2026-01-25 | 2026 PN WAVE Winter Invitational- Approved fast pool |
| 50 Freestyle | LCM | 34.47 | BB+0.28s to A | 2026-05-02 | 2026 PN BC May Flowers - Approved venue |
| 100 Freestyle | LCM | 1:16.93 | BB+1.64s to A | 2026-05-03 | 2026 PN BC May Flowers - Approved venue |
| 200 Freestyle | LCM | 2:42.57 | A+6.68s to AA | 2026-06-07 | 2026 PN VAST Summer Sprint & Dist. - Approved venue |
| 400 Freestyle | LCM | 5:50.14 | BB+5.75s to A | 2025-07-25 | 2025 PN LC 12&U Championships venue |
| 50 Backstroke | LCM | 40.24 | A+1.75s to AA | 2026-05-03 | 2026 PN BC May Flowers - Approved venue |
| 100 Backstroke | LCM | 1:28.67 | BB+0.48s to A | 2025-07-25 | 2025 PN LC 12&U Championships venue |
| 50 Breaststroke | LCM | 45.29 | BB+0.30s to A | 2026-06-06 | 2026 PN VAST Summer Sprint & Dist. - Approved venue |
| 100 Breaststroke | LCM | 1:40.00 | BB+0.71s to A | 2026-05-03 | 2026 PN BC May Flowers - Approved venue |
| 200 Breaststroke | LCM | 3:24.06 | A+0.67s to AA | 2026-06-07 | 2026 PN VAST Summer Sprint & Dist. - Approved venue |
| 50 Butterfly | LCM | 36.22 | A+0.03s to AA | 2026-06-06 | 2026 PN VAST Summer Sprint & Dist. - Approved venue |
| 100 Butterfly | LCM | 1:23.27 | A+1.08s to AA | 2025-07-26 | 2025 PN LC 12&U Championships venue |
| 200 Individual Medley | LCM | 3:05.07 | A+5.88s to AA | 2026-06-06 | 2026 PN VAST Summer Sprint & Dist. - Approved venue |
| 400 Individual Medley | LCM | 6:26.82 | A+3.53s to AA | 2026-05-01 | 2026 PN BC May Flowers - Approved venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 11.
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 | 33.63 | flying | 200 Free Relay (leg 2) | 2025-03-22 | 2025 Northwest Region Age Group Regionals |
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
2870 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:27.74 | 887 |
| 100 BK SCY | 1:17.58 | 450 |
| 100 BR SCY | 1:25.31 | 501 |
| 100 FL SCY | 1:15.25 | 484 |
| 200 IM SCY | 2:41.38 | 548 |
IMR 11-12 · LCM
2723 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:42.57 | 564 |
| 50 BK LCM | 40.24 | 531 |
| 50 BR LCM | 45.29 | 506 |
| 50 FL LCM | 36.22 | 584 |
| 200 IM LCM | 3:05.07 | 538 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:08.19
Front half 32.42s · back half 35.77s
200 Freestyle SCY 2:26.79
Front half 71.84s · back half 74.95s
500 Freestyle SCY 5:27.74 split/total mismatch
200 Backstroke SCY 2:41.91 · 8.0 min after 50 Backstroke
Front half 79.96s · back half 81.95s
100 Breaststroke SCY 1:25.31
Front half 39.51s · back half 45.80s
200 Breaststroke SCY 3:04.28
Front half 92.34s · back half 91.94s
100 Butterfly SCY 1:15.25 RT 0.55s
Front half 34.75s · back half 40.50s
100 Individual Medley SCY 1:15.91 RT 0.59s
Front half 33.74s · back half 42.17s
200 Individual Medley SCY 2:41.38 RT 0.54s
Front half 75.74s · back half 85.64s
400 Individual Medley SCY 5:38.52
Front half 166.54s · back half 171.98s
200 Freestyle LCM 2:42.57
Front half 77.02s · back half 85.55s
400 Freestyle LCM 5:50.14 RT 0.59s
Front half 177.38s · back half 172.76s
100 Backstroke LCM 1:28.67 RT 0.75s
Front half 44.22s · back half 44.45s
200 Breaststroke LCM 3:24.06 RT 0.53s· 12.5 min after 200 Freestyle
Front half 101.81s · back half 102.25s
200 Individual Medley LCM 3:05.07 · 11.7 min after 50 Butterfly
Front half 86.17s · back half 98.90s
400 Individual Medley LCM 6:26.82
Front half 188.36s · back half 198.46s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Progression
Faster times are higher. One card per event, all courses & history.