Mariko Nakayama

Age: 16 years old
Age Category: 15-16
Team: Brentwood Seawolves | Pacific Swimming

Personal Best

Short course distance

Event

Time

Age

Date

Standard

Next Standard

Brentwood Seawolves

Pacific Swimming

Western Zone

USA

Free 50 Y

27.80

02/25/2023

A: 27.29 (+0.51s | 1.8%)

313

1,000+

Free 100 Y

1:00.88

Analysis

11/20/2021

A: 58.89 (+1.99s | 3.3%)

313

1,000+

Back 50 Y

32.89

11/20/2021

184

1,000+

Back 100 Y

1:09.02

Analysis

09/30/2023

A: 1:04.09 (+4.93s | 7.1%)

234

1,000+

Breast 50 Y

37.99

03/04/2022

212

980

1,000+

Breast 100 Y

1:21.04

Analysis

11/20/2021

BB: 1:19.79 (+1.25s | 1.5%)

277

1,000+

Fly 50 Y

29.78

03/18/2022

156

723

1,000+

Fly 100 Y

1:03.65

Analysis

11/08/2025

AA: 1:01.09 (+2.56s | 4.0%)

123

609

1,000+

IM 200 Y

2:25.35

Analysis

11/22/2025

A: 2:22.39 (+2.96s | 2.0%)

197

960

1,000+

50 Fly

29.60

100 Back

37.22

1:06.82

100 IM

1:06.82

150 Breast

45.01

1:51.83

200 Free

33.52

2:25.35

100 IM

1:18.53

Long course distance

Event	Time		Age	Date	Standard	Next Standard	Brentwood Seawolves	Pacific Swimming	Western Zone	USA
Free 50 M	31.70		16	05/13/2023	BB	A: 30.89 (+0.81s \| 2.6%)	5	257	1,000+	1,000+

Free 100 M	1:08.75	Analysis	16	05/27/2023	BB	A: 1:07.19 (+1.56s \| 2.3%)	5	215	1,000+	1,000+

Back 50 M	38.00		16	06/25/2021			3	105	688	1,000+

Back 100 M	1:19.00	Analysis	16	05/27/2023	BB	A: 1:14.49 (+4.51s \| 5.7%)	2	140	786	1,000+

Breast 50 M	43.07		16	06/25/2021			1	98	574	1,000+

Breast 100 M	1:31.43	Analysis	16	05/13/2023	BB	A: 1:24.49 (+6.94s \| 7.6%)	1	171	762	1,000+

Fly 50 M	34.87		16	04/30/2022			2	108	625	1,000+

Above are the fastest times that Mariko Nakayama has achieved in her swimming career. For each event, you can find Mariko's best time, the corresponding time standard, as well as how much faster Mariko needs to be to reach the next level. The last columns provide Mariko rankings at the team and LSC levels. These rankings are based on the Mariko's personal best, her 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	Far Western	Senior Open	Senior 2	Western Zone Sr.	Sectionals	18U Spring Cup	Futures	Jrs - Winter	US Open	Summer Champ	NATIONAL
Free 50 Y	27.80	25.19 (+2.61s \| 9.4%)	29.99	27.69 (+0.11s \| 0.4%)	26.09 (+1.71s \| 6.2%)	24.89 (+2.91s \| 10.5%)	23.89 (+3.91s \| 14.1%)	23.89 (+3.91s \| 14.1%)	23.29 (+4.51s \| 16.2%)	22.59 (+5.21s \| 18.7%)	22.79 (+5.01s \| 18.0%)	N/A
Free 100 Y	1:00.88	54.99 (+5.89s \| 9.7%)	1:04.99	59.99 (+0.89s \| 1.5%)	56.59 (+4.29s \| 7.0%)	53.99 (+6.89s \| 11.3%)	51.89 (+8.99s \| 14.8%)	51.89 (+8.99s \| 14.8%)	50.39 (+10.49s \| 17.2%)	49.29 (+11.59s \| 19.0%)	49.69 (+11.19s \| 18.4%)	N/A
Back 50 Y	32.89	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Back 100 Y	1:09.02	1:00.89 (+8.13s \| 11.8%)	1:10.79	1:05.39 (+3.63s \| 5.3%)	1:01.39 (+7.63s \| 11.1%)	59.49 (+9.53s \| 13.8%)	57.09 (+11.93s \| 17.3%)	57.09 (+11.93s \| 17.3%)	55.09 (+13.93s \| 20.2%)	53.89 (+15.13s \| 21.9%)	54.49 (+14.53s \| 21.1%)	N/A
Breast 50 Y	37.99	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Breast 100 Y	1:21.04	1:09.69 (+11.35s \| 14.0%)	1:21.99	1:15.69 (+5.35s \| 6.6%)	1:10.49 (+10.55s \| 13.0%)	1:07.59 (+13.45s \| 16.6%)	1:05.49 (+15.55s \| 19.2%)	1:05.49 (+15.55s \| 19.2%)	1:03.09 (+17.95s \| 22.1%)	1:01.79 (+19.25s \| 23.8%)	1:02.79 (+18.25s \| 22.5%)	N/A
Fly 50 Y	29.78	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Fly 100 Y	1:03.65	1:00.49 (+3.16s \| 5.0%)	1:10.69	1:05.29	1:01.39 (+2.26s \| 3.6%)	59.19 (+4.46s \| 7.0%)	56.59 (+7.06s \| 11.1%)	56.59 (+7.06s \| 11.1%)	54.69 (+8.96s \| 14.1%)	53.49 (+10.16s \| 16.0%)	53.99 (+9.66s \| 15.2%)	N/A
IM 200 Y	2:25.35	2:13.69 (+11.66s \| 8.0%)	2:36.79	2:24.79 (+0.56s \| 0.4%)	2:16.99 (+8.36s \| 5.8%)	2:10.49 (+14.86s \| 10.2%)	2:06.39 (+18.96s \| 13.0%)	2:06.39 (+18.96s \| 13.0%)	2:02.19 (+23.16s \| 15.9%)	1:59.49 (+25.86s \| 17.8%)	2:00.59 (+24.76s \| 17.0%)	N/A

Long Course Distance

Event	Best Time	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
Free 50 M	31.70	29.19 (+2.51s \| 7.9%)	34.29	31.69 (+0.01s \| 0.0%)	29.89 (+1.81s \| 5.7%)	28.69 (+3.01s \| 9.5%)	27.39 (+4.31s \| 13.6%)	27.39 (+4.31s \| 13.6%)	26.89 (+4.81s \| 15.2%)	26.29 (+5.41s \| 17.1%)	26.59 (+5.11s \| 16.1%)	N/A	25.69 (+6.01s \| 19.0%)
Free 100 M	1:08.75	1:02.69 (+6.06s \| 8.8%)	1:14.09	1:08.39 (+0.36s \| 0.5%)	1:04.99 (+3.76s \| 5.5%)	1:01.89 (+6.86s \| 10.0%)	59.29 (+9.46s \| 13.8%)	59.29 (+9.46s \| 13.8%)	58.19 (+10.56s \| 15.4%)	56.99 (+11.76s \| 17.1%)	57.59 (+11.16s \| 16.2%)	N/A	55.79 (+12.96s \| 18.9%)
Back 50 M	38.00	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Back 100 M	1:19.00	1:10.79 (+8.21s \| 10.4%)	1:22.29	1:15.99 (+3.01s \| 3.8%)	1:11.79 (+7.21s \| 9.1%)	1:09.49 (+9.51s \| 12.0%)	1:06.79 (+12.21s \| 15.5%)	1:06.79 (+12.21s \| 15.5%)	1:04.79 (+14.21s \| 18.0%)	1:03.69 (+15.31s \| 19.4%)	1:04.39 (+14.61s \| 18.5%)	N/A	1:01.89 (+17.11s \| 21.7%)
Breast 50 M	43.07	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Breast 100 M	1:31.43	1:20.89 (+10.54s \| 11.5%)	1:33.89	1:26.69 (+4.74s \| 5.2%)	1:21.69 (+9.74s \| 10.7%)	1:18.79 (+12.64s \| 13.8%)	1:15.99 (+15.44s \| 16.9%)	1:15.99 (+15.44s \| 16.9%)	1:13.79 (+17.64s \| 19.3%)	1:12.19 (+19.24s \| 21.0%)	1:13.29 (+18.14s \| 19.8%)	N/A	1:10.29 (+21.14s \| 23.1%)
Fly 50 M	34.87	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Progression

See how Mariko Nakayama is improving gradually by choosing the distance and the stroke you are interested in. You can also compare the Mariko'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 Mariko Nakayama has participated in and her achievement. The last event displayed is the most recent. For each event, you can find the Mariko's time, the progress against Mariko's best time, the corresponding time standard, as well as how much faster Mariko needs to be to reach the next level.

Event

Time

Progress

Standard

Next Standard

Age

Heat

Lane

Ranking

Pacific Swim SC Senior Open Hosted By TERA

11/22/2025

Concord

200 Y IM

2:25.35

A: 2:22.39 (+2.96s | 2.0%)

50 Fly

29.60

100 Back

37.22

1:06.82

100 IM

1:06.82

150 Breast

45.01

1:51.83

200 Free

33.52

2:25.35

100 IM

1:18.53

Brentwood Seawolves SCY C B BB+

11/08/2025

Brentwood

100 Y Fly

1:03.65

AA: 1:01.09 (+2.56s | 4.0%)

SRVA SCY CBBB+

10/28/2023

San Ramon

50 Y Free

28.45

+0.65s

A: 27.89 (+0.56s | 2.0%)

100 Y Breast

1:21.58

+0.54s

A: 1:15.99 (+5.59s | 6.9%)

BSW C B BB+ Sep 30 Oct 1, 2023

09/30/2023

Brentwood

100 Y Breast

1:21.47

+0.43s

A: 1:15.99 (+5.48s | 6.7%)

100 Y Back

1:09.02

-0.22s (New PB)

A: 1:05.89 (+3.13s | 4.5%)

50 Y Free

27.92

+0.12s

A: 27.89 (+0.03s | 0.1%)

Crow Canyon Sharks Shortcourse C B BB+

09/16/2023

San Ramon

100 Y Breast

1:23.63

+2.59s

BB: 1:22.29 (+1.34s | 1.6%)

100 Y Back

1:09.65

+0.41s

A: 1:05.89 (+3.76s | 5.4%)

2023 SBA Adam Szmidt Memorial Meet

07/07/2023

Hollister

50 M Free

31.84

+0.14s

AA: 30.59 (+1.25s | 3.9%)

BSW Zone 2 C B B++ LCM (PC 23 073)

06/24/2023

Brentwood

100 M Back

1:19.98

+0.98s

A: 1:16.89 (+3.09s | 3.9%)

100 M Free

1:08.80

+0.05s

AA: 1:06.69 (+2.11s | 3.1%)

100 M Breast

1:33.40

+1.97s

A: 1:27.69 (+5.71s | 6.1%)

50 M Free

32.06

+0.36s

A: 31.89 (+0.17s | 0.5%)

2023 TYR Memorial Day Classic

05/27/2023

Stockton

100 M Breast

1:31.51

+0.08s

A: 1:27.69 (+3.82s | 4.2%)

100 M Free

1:08.75

-1.20s (New PB)

AA: 1:06.69 (+2.06s | 3.0%)

50 M Free

32.07

+0.37s

A: 31.89 (+0.18s | 0.6%)

100 M Back

1:19.00

-1.94s (New PB)

A: 1:16.89 (+2.11s | 2.7%)

Terrapins LCM C B BB+ Meet

05/13/2023

Concord

50 M Free

31.70

-0.90s (New PB)

AA: 30.59 (+1.11s | 3.5%)

100 M Back

1:20.94

A: 1:16.89 (+4.05s | 5.0%)

100 M Breast

1:31.43

-3.13s (New PB)

A: 1:27.69 (+3.74s | 4.1%)

100 M Free

1:09.95

-1.24s (New PB)

A: 1:09.59 (+0.36s | 0.5%)

CROW 14 UN JO Last Chance

02/25/2023

San Ramon

100 Y Free

1:01.47

+0.59s

A: 1:00.89 (+0.58s | 0.9%)

100 Y Breast

1:22.45

+1.41s

BB: 1:22.29 (+0.16s | 0.2%)

50 Y Free

27.80

-0.56s (New PB)

AA: 26.69 (+1.11s | 4.0%)

100 Y Back

1:09.24

-1.77s (New PB)

A: 1:05.89 (+3.35s | 4.8%)

2023Tiger Aquatics C B BB+

02/04/2023

Stockton

100 Y Back

1:11.01

-1.04s (New PB)

A: 1:05.89 (+5.12s | 7.2%)

100 Y Breast

1:21.84

+0.80s

A: 1:15.99 (+5.85s | 7.1%)

50 Y Free

28.36

+0.00s

A: 27.89 (+0.47s | 1.7%)

BSW C B BB+ January 7 8, 2023

01/07/2023

Brentwood

100 Y Breast

1:23.84

+2.80s

BB: 1:22.29 (+1.55s | 1.8%)

100 Y Back

1:12.05

-2.41s (New PB)

BB: 1:11.39 (+0.66s | 0.9%)

100 Y Free

1:02.47

+1.59s

A: 1:00.89 (+1.58s | 2.5%)

50 Y Free

29.15

+0.79s

A: 27.89 (+1.26s | 4.3%)

Crow Canyon Sharks 14 Un JO Last Chance

11/19/2022

San Ramon

100 Y Free

1:02.49

+1.61s

A: 1:00.89 (+1.60s | 2.6%)

100 Y Breast

1:23.45

+2.41s

BB: 1:22.29 (+1.16s | 1.4%)

SRVA SCY CBBB+

10/29/2022

San Ramon

100 Y Breast

1:23.81

+2.77s

BB: 1:22.29 (+1.52s | 1.8%)

50 Y Free

28.82

+0.46s

A: 27.89 (+0.93s | 3.2%)

Terrapins SCY C B BB+ Meet

10/01/2022

Concord

100 Y Free

1:04.12

+3.24s

A: 1:00.89 (+3.23s | 5.0%)

100 Y Breast

1:22.73

+1.69s

BB: 1:22.29 (+0.44s | 0.5%)

2022 Fred Siegrist Memorial Swim Meet

09/17/2022

Walnut Creek

100 Y Breast

1:23.08

+2.04s

BB: 1:22.29 (+0.79s | 1.0%)

100 Y Free

1:02.75

+1.87s

A: 1:00.89 (+1.86s | 3.0%)

100 Y Back

1:14.46

BB: 1:11.39 (+3.07s | 4.1%)

SRVA LCM CBBB+

04/30/2022

San Ramon

50 M Fly

34.87

-0.28s (New PB)

AA: 34.29 (+0.58s | 1.7%)

50 M Free

32.60

-0.31s (New PB)

AA: 31.89 (+0.71s | 2.2%)

100 M Free

1:11.39

+0.20s

AA: 1:10.29 (+1.10s | 1.5%)

2022 Pacific Swimming SC 14 U Junior Olympics

03/18/2022

Santa Clara

50 Y Fly

29.78

-0.57s (New PB)

AAA: 28.99 (+0.79s | 2.7%)

Tri Meet SCY TERA BSW TRIV

03/04/2022

Concord

100 Y IM

1:12.52

-0.08s (New PB)

AA: 1:09.99 (+2.53s | 3.5%)

50 Y Free

29.13

+0.77s

AA: 28.09 (+1.04s | 3.6%)

100 Y Breast

1:24.18

+3.14s

A: 1:22.19 (+1.99s | 2.4%)

50 Y Fly

30.35

-0.27s (New PB)

AA: 30.29 (+0.06s | 0.2%)

50 Y Breast

37.99

-0.01s (New PB)

A: 37.69 (+0.30s | 0.8%)

100 Y Free

1:02.81

+1.93s

AA: 1:01.39 (+1.42s | 2.3%)

2022 Zone 2 Championship Meet

01/29/2022

Moraga

100 Y Free

1:01.77

+0.89s

AA: 1:01.39 (+0.38s | 0.6%)

50 Y Free

28.36

-0.31s (New PB)

AA: 28.09 (+0.27s | 1.0%)

100 Y Breast

1:25.69

+4.65s

A: 1:22.19 (+3.50s | 4.1%)

CROW 14 UN JO Last Chance

11/20/2021

San Ramon

50 Y Back

32.89

-0.51s (New PB)

AA: 31.79 (+1.10s | 3.3%)

100 Y Breast

1:21.04

-1.76s (New PB)

AA: 1:18.59 (+2.45s | 3.0%)

50 Y Breast

38.30

+0.30s

A: 37.69 (+0.61s | 1.6%)

100 Y Free

1:00.88

-1.50s (New PB)

AAA: 58.69 (+2.19s | 3.6%)

50 Y Fly

30.62

-0.35s (New PB)

AA: 30.29 (+0.33s | 1.1%)

50 Y Free

28.67

-0.01s (New PB)

AA: 28.09 (+0.58s | 2.0%)

Orinda Aquatics Age Group C B BB+

10/30/2021

Moraga

50 Y Free

28.68

-0.18s (New PB)

AA: 28.09 (+0.59s | 2.1%)

100 Y Free

1:02.38

-1.79s (New PB)

AA: 1:01.39 (+0.99s | 1.6%)

50 Y Back

33.40

-1.30s (New PB)

A: 33.19 (+0.21s | 0.6%)

50 Y Breast

38.00

-0.98s (New PB)

A: 37.69 (+0.31s | 0.8%)

100 Y Breast

1:22.80

-0.51s (New PB)

A: 1:22.19 (+0.61s | 0.7%)

2021 FSM Summer S End Swim Classic

07/30/2021

Walnut Creek

50 Y Back

34.70

A: 33.19 (+1.51s | 4.4%)

50 Y Fly

31.30

+0.33s

AA: 30.29 (+1.01s | 3.2%)

50 Y Free

29.53

+0.67s

A: 29.29 (+0.24s | 0.8%)

100 Y IM

1:13.50

+0.90s

A: 1:13.09 (+0.41s | 0.6%)

50 IM

32.82

100 IM

40.68

1:13.50

100 IM

1:13.50

100 Y Breast

1:23.31

-0.22s (New PB)

A: 1:22.19 (+1.12s | 1.3%)

50 Breast

38.76

100 Breast

44.55

1:23.31

100 Breast

1:23.31

CROW BSW PASA WCAB Quad

06/25/2021

Brentwood

50 M Breast

43.07

-9.24s (New PB)

A: 42.69 (+0.38s | 0.9%)

50 M Free

32.91

AA: 31.89 (+1.02s | 3.1%)

100 M Free

1:11.19

-15.90s (New PB)

AA: 1:10.29 (+0.90s | 1.3%)

50 M Back

38.00

AA: 36.79 (+1.21s | 3.2%)

100 M Breast

1:34.56

A: 1:33.99 (+0.57s | 0.6%)

50 M Fly

35.15

AA: 34.29 (+0.86s | 2.4%)

BSW CROW NBA Short Course Meet

06/12/2021

Brentwood

50 Y Breast

38.98

A: 37.69 (+1.29s | 3.3%)

100 Y Breast

1:23.53

A: 1:22.19 (+1.34s | 1.6%)

100 Y Free

1:04.17

A: 1:03.99 (+0.18s | 0.3%)

50 Y Free

28.86

AA: 28.09 (+0.77s | 2.7%)

100 Y IM

1:12.60

AA: 1:09.99 (+2.61s | 3.6%)

50 Y Fly

30.97

AA: 30.29 (+0.68s | 2.2%)

BSW Zone 2 C B B++ Long Course

04/13/2019

Brentwood

100 M Free

1:27.09

A: 1:21.89 (+5.20s | 6.0%)

50 M Breast

52.31

A: 48.79 (+3.52s | 6.7%)

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.