Swimmer profile
Ko Yamamoto
Male11-12Center Grove Aquatic ClubIN · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
50.87
39.89
▲ 10.98
37.18
▲ 2.71
34.55
▲ 2.63
30.66
▲ 3.89
28.49
▲ 2.17
100 Free LCM
1:49.12
1:28.35
▲ 20.77
1:22.03
▲ 6.32
1:11.17
▲ 10.86
1:04.48
▲ 6.69
1:00.94
▲ 3.54
200 Free LCM
—
3:16.21
2:55.40
▲ 20.81
2:48.07
▲ 7.33
2:20.68
▲ 27.39
2:11.28
▲ 9.40
400 Free LCM
—
—
—
—
4:58.83
4:43.18
▲ 15.65
1500 Free LCM
—
—
—
—
—
18:47.84
50 Back LCM
57.39
45.98
▲ 11.41
41.84
▲ 4.14
39.47
▲ 2.37
35.67
▲ 3.80
33.27
▲ 2.40
100 Back LCM
2:08.62
1:37.90
▲ 30.72
1:27.86
▲ 10.04
1:31.60
▼ 3.74
1:16.71
▲ 14.89
1:08.91
▲ 7.80
200 Back LCM
—
—
—
—
—
2:33.17
50 Breast LCM
1:30.88
1:01.01
▲ 29.87
52.62
▲ 8.39
50.04
▲ 2.58
45.16
▲ 4.88
40.59
▲ 4.57
100 Breast LCM
—
2:06.40
1:50.63
▲ 15.77
1:41.15
▲ 9.48
1:35.60
▲ 5.55
1:28.48
▲ 7.12
50 Fly LCM
—
47.55
45.61
▲ 1.94
38.82
▲ 6.79
36.75
▲ 2.07
31.80
▲ 4.95
100 Fly LCM
—
2:06.40
1:33.66
▲ 32.74
1:31.05
▲ 2.61
1:23.63
▲ 7.42
—
200 IM LCM
—
3:40.08
3:11.35
▲ 28.73
3:07.67
▲ 3.68
3:08.43
▼ 0.76
2:32.63
▲ 35.80
Improvement<0.5s0.5–2s2–5s5s+Slower
📊 All Attempts by Event
Chronological history of every recorded swim. Click an event to expand its attempt list.