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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 9 01/16/2026 6 18 39 117
Free 50 Y 31.03 9 03/20/2026 A AA: 29.89 (+1.14s | 3.7%) 6 45 272 1,000+
Free 100 Y 1:08.53 Analysis 9 04/09/2026 A AA: 1:06.79 (+1.74s | 2.5%) 6 40 226 890
50 Free
32.40
32.40
100 Free
36.12
1:08.53
100 Free
1:08.53
Free 200 Y 2:45.86 Analysis 9 02/28/2026 BB A: 2:31.59 (+14.27s | 8.6%) 13 77 397 1,000+
Free 500 Y 7:15.08 Analysis 9 12/12/2025 BB A: 6:43.39 (+31.69s | 7.3%) 9 47 184 918
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 9 01/16/2026 4 8 13 44
Back 50 Y 35.79 9 04/09/2026 AA AAA: 33.99 (+1.80s | 5.0%) 5 24 144 543
Back 100 Y 1:19.49 Analysis 9 03/28/2026 A AA: 1:16.09 (+3.40s | 4.3%) 8 36 184 773
Breast 25 Y 20.76 9 01/16/2026 5 15 26 92
Breast 50 Y 42.68 9 03/28/2026 BB A: 42.09 (+0.59s | 1.4%) 9 59 216 759
Breast 100 Y 1:30.51 Analysis 9 03/28/2026 A AA: 1:26.59 (+3.92s | 4.3%) 6 38 200 758
Fly 25 Y 15.26 9 01/16/2026 2 3 5 12
Fly 50 Y 31.94 9 04/09/2026 AAA AAAA: 30.79 (+1.15s | 3.6%) 3 16 43 128
Fly 100 Y 1:13.74 Analysis 9 03/20/2026 AAA AAAA: 1:09.79 (+3.95s | 5.4%) 2 13 81 345
50 Fly
34.33
34.33
100 Fly
39.41
1:13.74
100 Fly
1:13.74
IM 100 Y 1:15.55 Analysis 9 04/09/2026 AA AAA: 1:13.09 (+2.46s | 3.3%) 5 22 79 245
50 IM
35.35
35.35
100 IM
40.20
1:15.55
100 IM
1:15.55
IM 200 Y 2:45.32 Analysis 9 02/28/2026 AA AAA: 2:38.39 (+6.93s | 4.2%) 5 26 119 495

Long course distance

Event Time Age Date Standard Next Standard Santa Clara Swim Club Pacific Swimming Western Zone USA
Free 50 M 39.97 9 05/30/2025 B BB: 39.79 (+0.18s | 0.5%) 7 55 252 475
Free 100 M 1:31.52 Analysis 9 06/27/2025 B BB: 1:30.59 (+0.93s | 1.0%) 11 57 249 462
Free 200 M 3:18.75 Analysis 9 05/23/2025 B BB: 3:14.99 (+3.76s | 1.9%) 7 45 179 342
Back 50 M 44.31 9 05/23/2025 BB A: 43.09 (+1.22s | 2.8%) 5 23 120 212
Back 100 M 1:46.45 Analysis 9 05/23/2025 B BB: 1:44.49 (+1.96s | 1.8%) 7 42 247 451
Breast 50 M 53.42 9 06/27/2025 BB A: 47.89 (+5.53s | 10.4%) 5 39 184 323
Breast 100 M 2:03.18 Analysis 9 05/30/2025 B BB: 1:59.19 (+3.99s | 3.2%) 12 65 253 426
50 Breast
57.60
57.60
100 Breast
1:05.58
2:03.18
100 Breast
2:03.18
Fly 50 M 39.50 9 05/30/2025 A AA: 38.59 (+0.91s | 2.3%) 3 15 58 102
Fly 100 M 1:29.64 Analysis 9 07/11/2025 AA AAA: 1:25.09 (+4.55s | 5.1%) 3 9 37 56
IM 200 M 3:26.23 Analysis 9 05/30/2025 BB A: 3:17.89 (+8.34s | 4.0%) 4 21 96 160
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.