Isshin Yokoyama

Mage 14MTPNWAVE

283 plausible swims · 36 meets · 2024-01-27 → 2026-06-20

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	24.51	AA+1.02s to AAA	2026-03-29	2026 PN Spring Showdown, Div. 4- Approved fast pool
100 Freestyle	SCY	54.76	A+1.27s to AA	2025-11-23	2025 PN Nov. AGI, Division 2 (SMAC) venue
200 Freestyle	SCY	2:04.87	BB+2.68s to A	2025-12-14	2025 PN 14&Under Short Course Champs-Approved venue
500 Freestyle	SCY	5:30.36	A+13.27s to AA	2025-11-03	2025 PN Bob Miller Sprint Distance Classic
1000 Freestyle	SCY	12:27.25	B+2.96s to BB	2025-02-07	2025 PN Wave February Distance Meet slow pool
1650 Freestyle	SCY	20:31.52	BB+80.13s to A	2025-02-07	2025 PN Wave February Distance Meet slow pool
50 Backstroke	SCY	29.11	BB+0.22s to A	2026-03-29	2026 PN Spring Showdown, Div. 4- Approved fast pool
100 Backstroke	SCY	1:04.88	BB+3.69s to A	2025-02-08	2025 PN SSCD Winter Open venue
200 Backstroke	SCY	2:19.46	BB+6.47s to A	2025-10-04	2025 PN Cascade Fall Classic venue
50 Breaststroke	SCY	32.51	A+0.82s to AA	2025-12-14	2025 PN 14&Under Short Course Champs-Approved venue
100 Breaststroke	SCY	1:11.79	BB+2.70s to A	2026-03-01	2026 PN February AGI, Division 2- Approved venue
200 Breaststroke	SCY	2:40.63	BB+10.34s to A	2025-01-25	2025 PN Wave Winter Invitational slow pool
50 Butterfly	SCY	26.82	AA+0.73s to AAA	2026-03-28	2026 PN Spring Showdown, Div. 4- Approved fast pool
100 Butterfly	SCY	1:01.14	BB+0.75s to A	2024-02-23	2024 PN February Age Group Invitational
200 Butterfly	SCY	2:40.83	+3.94s to B	2025-01-26	2025 PN Wave Winter Invitational slow pool
100 Individual Medley	SCY	1:05.12		2025-02-23	2025 PN SRST Champs Qualifier venue
200 Individual Medley	SCY	2:20.41	BB+5.02s to A	2025-10-04	2025 PN Cascade Fall Classic venue
400 Individual Medley	SCY	5:09.13	BB+19.64s to A	2025-02-21	2025 PN SRST Champs Qualifier venue
50 Freestyle	LCM	28.09	AA+1.20s to AAA	2026-05-02	2026 PN BC May Flowers - Approved venue
100 Freestyle	LCM	1:02.65	A+0.96s to AA	2026-06-06	2026 PN VAST Summer Sprint & Dist. - Approved venue
200 Freestyle	LCM	2:04.12	AAA+1.13s to AAAA	2026-06-06	2026 PN VAST Summer Sprint & Dist. - Approved
400 Freestyle	LCM	5:03.34	BB+3.45s to A	2026-06-07	2026 PN VAST Summer Sprint & Dist. - Approved venue
1500 Freestyle	LCM	21:14.75	BB+82.16s to A	2025-05-02	2025 PN BC May Flowers venue
50 Backstroke	LCM	33.89	A+1.40s to AA	2026-06-06	2026 PN VAST Summer Sprint & Dist. - Approved venue
100 Backstroke	LCM	1:15.31	BB+3.62s to A	2025-05-31	2025 PN VAST Summer Sprints and Distance Chal venue
200 Backstroke	LCM	2:36.03	BB+0.04s to A	2024-05-03	2024 PN BC May Flowers
50 Breaststroke	LCM	37.21	A+0.92s to AA	2026-06-19	2026 PN CSC 105th Annual Seattle Open- Approv venue
100 Breaststroke	LCM	1:10.07	AAAA	2025-07-17	2025 PN 13&O LC Senior Championships
200 Breaststroke	LCM	2:37.24	AAA+4.25s to AAAA	2025-07-17	2025 PN 13&O LC Senior Championships
50 Butterfly	LCM	30.42	AA+1.13s to AAA	2026-06-19	2026 PN CSC 105th Annual Seattle Open- Approv venue
100 Butterfly	LCM	1:03.40	AA+0.31s to AAA	2025-06-26	2025 PN CSC 104th Annual Senior Seattle Open
200 Butterfly	LCM	2:33.85	A+5.96s to AA	2025-06-26	2025 PN CSC 104th Annual Senior Seattle Open
200 Individual Medley	LCM	2:39.14	BB+2.25s to A	2025-07-17	2025 PN 13&O LC Senior Championships
400 Individual Medley	LCM	5:52.36	BB+16.87s to A	2025-06-01	2025 PN VAST Summer Sprints and Distance Chal venue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 14.

Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.

Fastest relay legs

Leg	Course	Time	Start	Relay	Date	Meet
50 Freestyle	SCY	26.87	flying	200 Free Relay (leg 2)	2024-03-23	2024 Northwest Region Age Group Regionals

Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.

IMX / IMR

IMX 13-14 · LCM

4095 points (6/6 events)

Event	Time	Points
400 FR LCM	5:03.34	639
200 BK LCM	2:36.03	666
200 BR LCM	2:37.24	904
200 FL LCM	2:33.85	672
200 IM LCM	2:39.14	640
400 IM LCM	5:52.36	574

IMR 13-14 · LCM

4059 points (5/5 events)

Event	Time	Points
200 FR LCM	2:04.12	972
100 BK LCM	1:15.31	579
100 BR LCM	1:10.07	1009
100 FL LCM	1:03.40	859
200 IM LCM	2:39.14	640

Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.

PR splits

100 Freestyle SCY 54.76

26.24

28.52

Front half 26.24s · back half 28.52s

200 Freestyle SCY 2:04.87 RT 0.45s

27.40

32.36

33.11

32.00

Front half 59.76s · back half 65.11s

1650 Freestyle SCY 20:31.52

31.56

35.23

36.99

37.21

37.30

37.89

38.30

38.33

37.57

37.67

37.95

38.05

38.54

37.69

37.90

38.15

37.51

38.13

37.62

37.66

37.53

37.97

37.76

37.38

37.46

37.73

36.98

37.35

38.21

37.23

37.62

36.07

34.98

100 Backstroke SCY 1:04.88

31.62

33.26

Front half 31.62s · back half 33.26s

200 Backstroke SCY 2:19.46

32.50

35.24

36.04

35.68

Front half 67.74s · back half 71.72s

100 Breaststroke SCY 1:11.79

33.45

38.34

Front half 33.45s · back half 38.34s

200 Breaststroke SCY 2:40.63

36.77

40.96

41.43

41.47

Front half 77.73s · back half 82.90s

200 Butterfly SCY 2:40.83

34.39

41.84

43.62

40.98

Front half 76.23s · back half 84.60s

100 Individual Medley SCY 1:05.12

30.85

34.27

Front half 30.85s · back half 34.27s

200 Individual Medley SCY 2:20.41

29.18

35.86

41.76

33.61

Front half 65.04s · back half 75.37s

400 Individual Medley SCY 5:09.13

32.88

40.75

38.66

38.78

43.98

44.00

35.41

34.67

Front half 151.07s · back half 158.06s

400 Freestyle LCM 5:03.34 RT 0.69s· 26.7 min after 200 Freestyle

71.10

79.42

77.79

75.03

Front half 150.52s · back half 152.82s

1500 Freestyle LCM 21:14.75 RT 0.67s

79.79

86.11

85.48

86.75

87.32

86.50

86.36

85.92

85.17

85.51

85.02

83.93

85.87

83.73

81.29

200 Butterfly LCM 2:33.85

81.42

183.43

78.04

153.85

200 Individual Medley LCM 2:39.14 split/total mismatch

76.41

86.20

39.41

43.82

35.87

33.89

Front half 202.02s · back half -42.88s

400 Individual Medley LCM 5:52.36 RT 0.64s

79.39

90.37

101.51

81.09

Front half 169.76s · back half 182.60s

Reaction time

fastest 0.34s average 0.651s slowest 0.96s 41 electronic starts

Start reaction over time faster starts higher

From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.

Progression

Faster times are higher. One card per event, all courses & history.

50 Freestyle SCY 24.51 20 swims

100 Freestyle SCY 54.76 25 swims

200 Freestyle SCY 2:04.87 10 swims

500 Freestyle SCY 5:30.36 3 swims

1000 Freestyle SCY 12:27.25 1 swim

1650 Freestyle SCY 20:31.52 1 swim

50 Backstroke SCY 29.11 9 swims

100 Backstroke SCY 1:04.88 15 swims

200 Backstroke SCY 2:19.46 7 swims

50 Breaststroke SCY 32.51 10 swims

100 Breaststroke SCY 1:11.79 20 swims

200 Breaststroke SCY 2:40.63 9 swims

50 Butterfly SCY 26.82 20 swims

100 Butterfly SCY 1:01.14 13 swims

200 Butterfly SCY 2:40.83 6 swims

100 Individual Medley SCY 1:05.12 11 swims

200 Individual Medley SCY 2:20.41 8 swims

400 Individual Medley SCY 5:09.13 3 swims

50 Freestyle LCM 28.09 11 swims

100 Freestyle LCM 1:02.65 7 swims

200 Freestyle LCM 2:04.12 7 swims

400 Freestyle LCM 5:03.34 3 swims

1500 Freestyle LCM 21:14.75 1 swim

50 Backstroke LCM 33.89 7 swims

100 Backstroke LCM 1:15.31 5 swims

200 Backstroke LCM 2:36.03 2 swims

50 Breaststroke LCM 37.21 7 swims

100 Breaststroke LCM 1:10.07 6 swims

200 Breaststroke LCM 2:37.24 5 swims

50 Butterfly LCM 30.42 8 swims

100 Butterfly LCM 1:03.40 8 swims

200 Butterfly LCM 2:33.85 4 swims

200 Individual Medley LCM 2:39.14 8 swims

400 Individual Medley LCM 5:52.36 3 swims