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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 37 113
Free 50 Y 31.03 9 03/20/2026 A AA: 29.89 (+1.14s | 3.7%) 6 46 252 1,000+
Free 100 Y 1:08.53 Analysis 9 04/09/2026 A AA: 1:06.79 (+1.74s | 2.5%) 6 34 203 836
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 68 354 1,000+
Free 500 Y 7:15.08 Analysis 9 12/12/2025 BB A: 6:43.39 (+31.69s | 7.3%) 9 44 169 873
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 42
Back 50 Y 35.79 9 04/09/2026 AA AAA: 33.99 (+1.80s | 5.0%) 5 24 120 483
Back 100 Y 1:19.49 Analysis 9 03/28/2026 A AA: 1:16.09 (+3.40s | 4.3%) 8 34 166 718
Breast 25 Y 20.76 9 01/16/2026 6 16 28 93
Breast 50 Y 42.68 9 03/28/2026 BB A: 42.09 (+0.59s | 1.4%) 9 55 188 664
Breast 100 Y 1:30.51 Analysis 9 03/28/2026 A AA: 1:26.59 (+3.92s | 4.3%) 6 33 173 706
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 16 39 114
Fly 100 Y 1:13.74 Analysis 9 03/20/2026 AAA AAAA: 1:09.79 (+3.95s | 5.4%) 2 13 71 332
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 20 64 215
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 24 105 462

Long course distance

Event Time Age Date Standard Next Standard Santa Clara Swim Club Pacific Swimming Western Zone USA
Free 50 M 36.52 9 05/22/2026 BB A: 35.69 (+0.83s | 2.3%) 9 40 170 467
Free 100 M 1:21.27 Analysis 9 05/22/2026 BB A: 1:20.19 (+1.08s | 1.3%) 8 43 154 406
Free 200 M 3:18.75 Analysis 9 05/23/2025 B BB: 3:14.99 (+3.76s | 1.9%) 20 90 323 842
Back 50 M 41.69 9 05/22/2026 A AA: 41.09 (+0.60s | 1.4%) 8 24 83 230
Back 100 M 1:29.43 Analysis 9 05/22/2026 A AA: 1:28.19 (+1.24s | 1.4%) 4 20 72 201
Breast 50 M 48.09 9 05/22/2026 BB A: 47.89 (+0.20s | 0.4%) 5 28 94 235
Breast 100 M 2:03.18 Analysis 9 05/30/2025 B BB: 1:59.19 (+3.99s | 3.2%) 22 131 466 1,000+
50 Breast
57.60
57.60
100 Breast
1:05.58
2:03.18
100 Breast
2:03.18
Fly 50 M 35.76 9 05/22/2026 AAA AAAA: 34.69 (+1.07s | 3.0%) 3 14 27 59
Fly 100 M 1:29.64 Analysis 9 07/11/2025 AA AAA: 1:25.09 (+4.55s | 5.1%) 3 14 54 129
IM 200 M 3:05.19 Analysis 9 05/22/2026 AA AAA: 3:00.79 (+4.40s | 2.4%) 4 15 43 107

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.