Tatsumasa Sekine

Age: 8 years old
Age Category: 10 & under
Team: Santa Clara Swim Club | Pacific Swimming
Participation: 8 meets 32 events

Personal Best

Long course distance

Event

Time

Age

Date

Standard

Next Standard

Pacific Swimming

Santa Clara Swim Club

Free 50 M

39.97

05/30/2025

BB: 39.79 (+0.18s | 0.5%)

Breast 100 M

2:03.18

05/30/2025

BB: 1:59.19 (+3.99s | 3.2%)

101

50 Breast

57.60

100 Breast

1:05.58

2:03.18

100 Breast

2:03.18

Fly 50 M

39.50

05/30/2025

AA: 38.59 (+0.91s | 2.3%)

IM 200 M

3:26.23

05/30/2025

A: 3:17.89 (+8.34s | 4.0%)

50 Fly

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

Short course distance

Event

Time

Age

Date

Standard

Next Standard

Pacific Swimming

Santa Clara Swim Club

Free 25 Y

19.36

01/24/2025

254

Free 50 Y

38.47

04/26/2025

B: 38.19 (+0.28s | 0.7%)

264

Back 25 Y

24.21

01/24/2025

269

Back 50 Y

43.42

04/26/2025

BB: 42.89 (+0.53s | 1.2%)

153

Back 100 Y

1:37.33

03/01/2025

BB: 1:30.09 (+7.24s | 7.4%)

135

50 Back

48.56

100 Back

48.77

1:37.33

100 Back

1:37.33

Breast 25 Y

24.76

01/24/2025

104

Breast 50 Y

51.71

04/26/2025

BB: 47.69 (+4.02s | 7.8%)

238

Fly 25 Y

18.91

01/24/2025

Fly 50 Y

37.69

04/26/2025

A: 35.99 (+1.70s | 4.5%)

Fly 100 Y

1:22.70

06/14/2025

AA: 1:19.49 (+3.21s | 3.9%)

IM 100 Y

1:28.63

06/14/2025

A: 1:19.69 (+8.94s | 10.1%)

102

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.

Time Standards

Got the currrent age group time standard
Time standard for the next age group and the gap to reach it
Got the next age group’s time standard.

Short Course Distance

Event	Best Time	Age Group Championship	Far Western	Senior Open	Senior 2	Western Zone Sr.	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	NATIONAL	SouthWestern Age Group Regional
Free 50 Y	38.47	30.99 (+7.48s \| 19.4%)	30.19 (+8.28s \| 21.5%)	26.89 (+11.58s \| 30.1%)	24.79 (+13.68s \| 35.6%)	23.29 (+15.18s \| 39.5%)	22.19 (+16.28s \| 42.3%)	21.29 (+17.18s \| 44.7%)	21.29 (+17.18s \| 44.7%)	20.59 (+17.88s \| 46.5%)	20.09 (+18.38s \| 47.8%)	20.39 (+18.08s \| 47.0%)	N/A	30.49 (+7.98s \| 20.7%)
Back 50 Y	43.42	36.99 (+6.43s \| 14.8%)	35.79 (+7.63s \| 17.6%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	36.29 (+7.13s \| 16.4%)
Back 100 Y	1:37.33	1:18.89 (+18.44s \| 18.9%)	1:17.09 (+20.24s \| 20.8%)	1:04.69 (+32.64s \| 33.5%)	59.79 (+37.54s \| 38.6%)	55.99 (+41.34s \| 42.5%)	53.89 (+43.44s \| 44.6%)	51.49 (+45.84s \| 47.1%)	51.49 (+45.84s \| 47.1%)	49.39 (+47.94s \| 49.3%)	47.59 (+49.74s \| 51.1%)	48.89 (+48.44s \| 49.8%)	N/A	1:16.59 (+20.74s \| 21.3%)
Breast 50 Y	51.71	40.99 (+10.72s \| 20.7%)	39.99 (+11.72s \| 22.7%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	40.29 (+11.42s \| 22.1%)
Fly 50 Y	37.69	35.39 (+2.30s \| 6.1%)	33.99 (+3.70s \| 9.8%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	34.69 (+3.00s \| 8.0%)
Fly 100 Y	1:22.70	1:22.69 (+0.01s \| 0.0%)	1:20.49 (+2.21s \| 2.7%)	1:03.89 (+18.81s \| 22.7%)	58.99 (+23.71s \| 28.7%)	55.49 (+27.21s \| 32.9%)	52.89 (+29.81s \| 36.0%)	50.59 (+32.11s \| 38.8%)	50.59 (+32.11s \| 38.8%)	48.99 (+33.71s \| 40.8%)	47.79 (+34.91s \| 42.2%)	48.39 (+34.31s \| 41.5%)	N/A	1:19.89 (+2.81s \| 3.4%)
IM 100 Y	1:28.63	1:18.89 (+9.74s \| 11.0%)	1:16.89 (+11.74s \| 13.2%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	1:16.99 (+11.64s \| 13.1%)

Long Course Distance

Event	Best Time	Age Group Championship	Far Western	Senior Open	Senior 2	Western Zone Sr.	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	NATIONAL	U.S Olympic Team Trials	SouthWestern Age Group Regional
Free 50 M	39.97	35.49 (+4.48s \| 11.2%)	34.39 (+5.58s \| 14.0%)	30.19 (+9.78s \| 24.5%)	27.89 (+12.08s \| 30.2%)	26.79 (+13.18s \| 33.0%)	25.89 (+14.08s \| 35.2%)	24.59 (+15.38s \| 38.5%)	24.59 (+15.38s \| 38.5%)	24.29 (+15.68s \| 39.2%)	23.39 (+16.58s \| 41.5%)	23.79 (+16.18s \| 40.5%)	N/A	22.79 (+17.18s \| 43.0%)	34.59 (+5.38s \| 13.5%)
Breast 100 M	2:03.18	1:42.69 (+20.49s \| 16.6%)	1:39.19 (+23.99s \| 19.5%)	1:25.49 (+37.69s \| 30.6%)	1:18.89 (+44.29s \| 36.0%)	1:13.79 (+49.39s \| 40.1%)	1:11.29 (+51.89s \| 42.1%)	1:08.19 (+54.99s \| 44.6%)	1:08.19 (+54.99s \| 44.6%)	1:06.59 (+56.59s \| 45.9%)	1:04.09 (+59.09s \| 48.0%)	1:05.29 (+57.89s \| 47.0%)	N/A	1:02.19 (+60.99s \| 49.5%)	1:40.19 (+22.99s \| 18.7%)
Fly 50 M	39.50	40.19	38.49 (+1.01s \| 2.6%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	39.19 (+0.31s \| 0.8%)
IM 200 M	3:26.23	3:14.29 (+11.94s \| 5.8%)	3:09.69 (+16.54s \| 8.0%)	2:45.49 (+40.74s \| 19.8%)	2:32.79 (+53.44s \| 25.9%)	2:25.09 (+61.14s \| 29.6%)	2:18.39 (+67.84s \| 32.9%)	2:12.79 (+73.44s \| 35.6%)	2:12.79 (+73.44s \| 35.6%)	2:09.59 (+76.64s \| 37.2%)	2:05.79 (+80.44s \| 39.0%)	2:08.19 (+78.04s \| 37.8%)	N/A	2:03.49 (+82.74s \| 40.1%)	3:08.29 (+17.94s \| 8.7%)

Progression

See how Tatsumasa Sekine is improving gradually by choosing the distance and the stroke you are interested in. You can also compare the Tatsumasa's time to another swimmer's and even view their profile for more information about them.

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Meets

See all the meets Tatsumasa Sekine has participated in and his achievement. The last event displayed is the most recent. For each event, you can find the Tatsumasa's time, the progress against Tatsumasa's best time, the corresponding time standard, as well as how much faster Tatsumasa needs to be to reach the next level.

Event

Time

Progress

Standard

Next Standard

Age

Heat

Lane

Ranking

SCSC Blue Gold Block Party Meet June

06/14/2025

100 Y Fly

1:22.70

AA: 1:19.49 (+3.21s | 3.9%)

100 Y IM

1:28.63

-9.59s (New PB)

A: 1:19.69 (+8.94s | 10.1%)

50 Y Back

44.44

+1.02s

BB: 42.89 (+1.55s | 3.5%)

SCSC Pacific Swimming Long Course Intrasquad

05/30/2025

200 M IM

3:26.23

A: 3:17.89 (+8.34s | 4.0%)

50 Fly

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

50 M Fly

39.50

AA: 38.59 (+0.91s | 2.3%)

100 M Breast

2:03.18

BB: 1:59.19 (+3.99s | 3.2%)

50 Breast

57.60

100 Breast

1:05.58

2:03.18

100 Breast

2:03.18

50 M Free

39.97

BB: 39.79 (+0.18s | 0.5%)

Pacific Swimming 10 Under SC Championships

04/26/2025

Palo Alto, CA

50 Y Free

38.47

-1.04s (New PB)

B: 38.19 (+0.28s | 0.7%)

50 Y Fly

37.69

-4.77s (New PB)

A: 35.99 (+1.70s | 4.5%)

50 Y Back

43.42

-2.25s (New PB)

BB: 42.89 (+0.53s | 1.2%)

50 Y Breast

51.71

-2.63s (New PB)

BB: 47.69 (+4.02s | 7.8%)

Santa Clara Swim Club Race To AG Champs

03/01/2025

Morgan Hill, CA

50 Y Fly

42.46

-2.71s (New PB)

BB: 41.29 (+1.17s | 2.8%)

50 Y Back

45.67

-6.60s (New PB)

BB: 42.89 (+2.78s | 6.1%)

100 Y IM

1:39.73

+1.51s

B: 1:39.69 (+0.04s | 0.0%)

100 Y Back

1:37.33

BB: 1:30.09 (+7.24s | 7.4%)

50 Back

48.56

100 Back

48.77

1:37.33

100 Back

1:37.33

50 Y Breast

54.34

-0.24s (New PB)

B: 53.39 (+0.95s | 1.7%)

50 Y Free

39.51

-0.82s (New PB)

B: 38.19 (+1.32s | 3.3%)

2025 Brian Malick Memorial Z1S Championships

01/24/2025

Morgan Hill, CA

25 Y Breast

24.76

25 Y Free

19.36

25 Y Fly

18.91

50 Y Free

40.33

-1.72s (New PB)

B: 38.19 (+2.14s | 5.3%)

25 Y Back

24.21

100 Y IM

1:38.22

BB: 1:29.69 (+8.53s | 8.7%)

Zone 1S End of Season AGC- Invitational Meet

12/14/2024

Morgan Hill, CA

50 Y Free

42.05

-3.45s (New PB)

B: 38.19 (+3.86s | 9.2%)

50 Y Breast

54.58

-9.77s (New PB)

B: 53.39 (+1.19s | 2.2%)

50 Y Fly

45.17

-8.35s (New PB)

BB: 41.29 (+3.88s | 8.6%)

Zone 1S Race to AGCs C/B/A+ Meet (hosts: MBSC, ACSC, GSMY)

11/15/2024

Morgan Hill, CA

50 Y Back

52.27

-2.74s (New PB)

B: 48.29 (+3.98s | 7.6%)

50 Y Free

45.50

-5.59s (New PB)

B: 38.19 (+7.31s | 16.1%)

SCSC SCY CBA+ Meet

10/04/2024

Morgan Hill, CA

50 Y Back

55.01

B: 48.29 (+6.72s | 12.2%)

50 Y Breast

1:04.35

B: 53.39 (+10.96s | 17.0%)

50 Y Fly

53.52

B: 46.49 (+7.03s | 13.1%)

50 Y Free

51.09

B: 38.19 (+12.90s | 25.2%)

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.

Event	Best Time	Age Group Championship	Far Western	Senior Open	Senior 2	Western Zone Sr.	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	NATIONAL	U.S Olympic Team Trials	SouthWestern Age Group Regional
Free 50 M	39.97	35.49 (+4.48s \| 11.2%)	34.39 (+5.58s \| 14.0%)	30.19 (+9.78s \| 24.5%)	27.89 (+12.08s \| 30.2%)	26.79 (+13.18s \| 33.0%)	25.89 (+14.08s \| 35.2%)	24.59 (+15.38s \| 38.5%)	24.59 (+15.38s \| 38.5%)	24.29 (+15.68s \| 39.2%)	23.39 (+16.58s \| 41.5%)	23.79 (+16.18s \| 40.5%)	N/A	22.79 (+17.18s \| 43.0%)	34.59 (+5.38s \| 13.5%)
Breast 100 M	2:03.18	1:42.69 (+20.49s \| 16.6%)	1:39.19 (+23.99s \| 19.5%)	1:25.49 (+37.69s \| 30.6%)	1:18.89 (+44.29s \| 36.0%)	1:13.79 (+49.39s \| 40.1%)	1:11.29 (+51.89s \| 42.1%)	1:08.19 (+54.99s \| 44.6%)	1:08.19 (+54.99s \| 44.6%)	1:06.59 (+56.59s \| 45.9%)	1:04.09 (+59.09s \| 48.0%)	1:05.29 (+57.89s \| 47.0%)	N/A	1:02.19 (+60.99s \| 49.5%)	1:40.19 (+22.99s \| 18.7%)
Fly 50 M	39.50	40.19	38.49 (+1.01s \| 2.6%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	39.19 (+0.31s \| 0.8%)
IM 200 M	3:26.23	3:14.29 (+11.94s \| 5.8%)	3:09.69 (+16.54s \| 8.0%)	2:45.49 (+40.74s \| 19.8%)	2:32.79 (+53.44s \| 25.9%)	2:25.09 (+61.14s \| 29.6%)	2:18.39 (+67.84s \| 32.9%)	2:12.79 (+73.44s \| 35.6%)	2:12.79 (+73.44s \| 35.6%)	2:09.59 (+76.64s \| 37.2%)	2:05.79 (+80.44s \| 39.0%)	2:08.19 (+78.04s \| 37.8%)	N/A	2:03.49 (+82.74s \| 40.1%)	3:08.29 (+17.94s \| 8.7%)