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Tatsumasa Sekine

Age: 9 years old
Age Category: 10 & under
Team: Santa Clara Swim Club | Pacific Swimming

Personal Best

Short course distance

Event Time Age Date Standard Next Standard Santa Clara Swim Club Pacific Swimming Western Zone USA
Free 25 Y 15.27 8 01/16/2026 6 21 42 123
Free 50 Y 31.41 9 02/21/2026 BB A: 31.09 (+0.32s | 1.0%) 9 69 346 1,000+
Free 100 Y 1:11.23 9 02/28/2026 BB A: 1:09.79 (+1.44s | 2.0%) 10 77 381 1,000+
Free 200 Y 2:45.86 9 02/28/2026 BB A: 2:31.59 (+14.27s | 8.6%) 17 115 475 1,000+
Free 500 Y 7:15.08 8 12/12/2025 BB A: 6:43.39 (+31.69s | 7.3%) 12 62 214 1,000+
50 Free
35.70
35.70
100 Free
43.36
1:19.06
100 Free
1:19.06
150 Free
44.63
2:03.69
200 Free
44.80
2:48.49
100 Free
1:29.43
250 Free
44.05
3:32.54
300 Free
45.35
4:17.89
100 Free
1:29.40
350 Free
45.98
5:03.87
400 Free
45.19
5:49.06
100 Free
1:31.17
450 Free
44.91
6:33.97
500 Free
41.11
7:15.08
100 Free
1:26.02
Back 25 Y 17.88 8 01/16/2026 5 10 15 48
Back 50 Y 36.95 9 02/28/2026 A AA: 35.79 (+1.16s | 3.1%) 10 55 231 967
Back 100 Y 1:21.18 9 02/28/2026 BB A: 1:19.59 (+1.59s | 2.0%) 12 50 237 1,000+
Breast 25 Y 20.76 8 01/16/2026 6 19 31 98
Breast 50 Y 44.47 9 02/07/2026 BB A: 42.09 (+2.38s | 5.4%) 16 115 372 1,000+
Breast 100 Y 1:44.45 8 09/27/2025 B BB: 1:42.29 (+2.16s | 2.1%) 24 179 702 1,000+
Fly 25 Y 15.26 8 01/16/2026 2 4 6 14
Fly 50 Y 32.11 9 02/21/2026 AAA AAAA: 30.79 (+1.32s | 4.1%) 4 16 50 175
Fly 100 Y 1:18.82 8 11/14/2025 AA AAA: 1:14.59 (+4.23s | 5.4%) 8 30 160 625
50 Fly
37.16
37.16
100 Fly
41.66
1:18.82
100 Fly
1:18.82
IM 100 Y 1:15.57 9 02/28/2026 AA AAA: 1:13.09 (+2.48s | 3.3%) 8 26 80 280
IM 200 Y 2:45.32 9 02/28/2026 AA AAA: 2:38.39 (+6.93s | 4.2%) 8 31 125 565

Long course distance

Event Time Age Date Standard Next Standard Santa Clara Swim Club Pacific Swimming Western Zone USA
Free 50 M 39.97 8 05/30/2025 B BB: 39.79 (+0.18s | 0.5%) 11 95 332 588
Free 100 M 1:31.52 8 06/27/2025 B BB: 1:30.59 (+0.93s | 1.0%) 15 98 327 569
Free 200 M 3:18.75 8 05/23/2025 B BB: 3:14.99 (+3.76s | 1.9%) 11 79 241 425
Back 50 M 44.31 8 05/23/2025 BB A: 43.09 (+1.22s | 2.8%) 8 46 166 270
Back 100 M 1:46.45 8 05/23/2025 B BB: 1:44.49 (+1.96s | 1.8%) 10 73 316 543
Breast 50 M 53.42 8 06/27/2025 BB A: 47.89 (+5.53s | 10.4%) 10 73 247 402
Breast 100 M 2:03.18 8 05/30/2025 B BB: 1:59.19 (+3.99s | 3.2%) 16 111 334 529
50 Breast
57.60
57.60
100 Breast
1:05.58
2:03.18
100 Breast
2:03.18
Fly 50 M 39.50 8 05/30/2025 A AA: 38.59 (+0.91s | 2.3%) 5 27 86 138
Fly 100 M 1:29.64 8 07/11/2025 AA AAA: 1:25.09 (+4.55s | 5.1%) 5 19 55 80
IM 200 M 3:26.23 8 05/30/2025 BB A: 3:17.89 (+8.34s | 4.0%) 8 39 126 201
50 Fly
41.85
41.85
100 Back
55.87
1:37.72
100 IM
1:37.72
150 Breast
1:01.14
2:38.86
200 Free
47.37
3:26.23
100 IM
1:48.51

Above are the fastest times that Tatsumasa Sekine has achieved in his swimming career. For each event, you can find Tatsumasa's best time, the corresponding time standard, as well as how much faster Tatsumasa needs to be to reach the next level. The last columns provide Tatsumasa rankings at the team and LSC levels. These rankings are based on the Tatsumasa's personal best, his current age category, and team; and are calculated from all the meets results.

Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.