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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 9 22 41 118
Free 50 Y 31.03 9 03/20/2026 A AA: 29.89 (+1.14s | 3.7%) 6 38 216 938
Free 100 Y 1:08.53 Analysis 9 04/09/2026 A AA: 1:06.79 (+1.74s | 2.5%) 6 28 165 734
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 61 297 1,000+
Free 500 Y 7:15.08 Analysis 9 12/12/2025 BB A: 6:43.39 (+31.69s | 7.3%) 9 39 134 759
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 9 14 40
Back 50 Y 35.79 9 04/09/2026 AA AAA: 33.99 (+1.80s | 5.0%) 6 20 93 398
Back 100 Y 1:19.49 Analysis 9 03/28/2026 A AA: 1:16.09 (+3.40s | 4.3%) 7 33 135 596
Breast 25 Y 20.76 9 01/16/2026 7 15 29 91
Breast 50 Y 42.68 9 03/28/2026 BB A: 42.09 (+0.59s | 1.4%) 9 52 147 533
Breast 100 Y 1:30.51 Analysis 9 03/28/2026 A AA: 1:26.59 (+3.92s | 4.3%) 6 28 146 612
Fly 25 Y 15.26 9 01/16/2026 2 4 6 11
Fly 50 Y 31.94 9 04/09/2026 AAA AAAA: 30.79 (+1.15s | 3.6%) 3 13 27 84
Fly 100 Y 1:13.74 Analysis 9 03/20/2026 AAA AAAA: 1:09.79 (+3.95s | 5.4%) 2 11 59 293
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 17 47 161
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 20 88 396

Long course distance

Event Time Age Date Standard Next Standard Santa Clara Swim Club Pacific Swimming Western Zone USA
Free 50 M 34.32 9 08/05/2026 AA AAA: 32.99 (+1.33s | 3.9%) 7 30 123 343
Free 100 M 1:17.25 Analysis 9 06/27/2026 A AA: 1:16.69 (+0.56s | 0.7%) 9 39 146 403
50 Free
37.82
37.82
100 Free
39.43
1:17.25
100 Free
1:17.25
Free 200 M 2:40.33 Analysis 9 07/30/2026 AA AAA: 2:38.89 (+1.44s | 0.9%) 7 21 66 183
Back 50 M 38.87 9 07/30/2026 AAA AAAA: 36.99 (+1.88s | 4.8%) 5 15 60 172
Back 100 M 1:27.52 Analysis 9 08/05/2026 AA AAA: 1:24.09 (+3.43s | 3.9%) 8 27 90 281
Breast 50 M 45.97 9 06/27/2026 A AA: 45.79 (+0.18s | 0.4%) 5 23 87 243
Breast 100 M 2:03.18 Analysis 9 05/30/2025 B BB: 1:59.19 (+3.99s | 3.2%) 25 145 596 1,000+
50 Breast
57.60
57.60
100 Breast
1:05.58
2:03.18
100 Breast
2:03.18
Fly 50 M 34.85 9 07/17/2026 AAA AAAA: 34.69 (+0.16s | 0.5%) 3 12 30 65
Fly 100 M 1:16.82 Analysis 9 07/30/2026 AAAA 2 7 17 33
50 Fly
36.61
36.61
100 Fly
40.21
1:16.82
100 Fly
1:16.82
IM 200 M 2:58.21 Analysis 9 07/17/2026 AAA AAAA: 2:52.19 (+6.02s | 3.4%) 5 15 48 118

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.