Progress against the field
Ikuko Shiga has gained 2:32 on the field from Yokohama 2025 to Chiba 2026.
The clock says 8:33 faster, but the races themselves got 6:01 quicker for everyone.
The longest gap between two races compared here, 188 days between Osaka 2026 and Chiba 2026, still ended 3:19 ahead of the field.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown. The summary above covers Individual Open · Women, the one raced most; every comparison is in the list below.
Every race
5 races · 3 events
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Chiba6 Aug 2026Doubles Open · Mixed1:12:04 PB99/761Beat 87%
↑ 188 days after Osaka 2026, with Shu Yagi 3:18 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:19 faster on the clock looks better than it was: the race was 3:37 faster for everyone, which leaves this 3:18 behind the field.
The fieldCompare these two →3:37 faster This pair0:19 faster -
Chiba6 Aug 2026Individual Open · Women1:16:54 PB15/210Beat 93%
↑ 188 days after Osaka 2026 3:19 better than the field Why ↓Close ↑
3:19 better than the field: 5:57 faster on the clock, against 2:38 faster for everyone.
The fieldCompare these two →2:38 faster This athlete5:57 faster -
Osaka30 Jan 2026Individual Open · Women1:22:5165/619Beat 90%
↑ 174 days after Yokohama 2025 0:47 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:36 faster on the clock looks better than it was: the race was 3:23 faster for everyone, which leaves this 0:47 behind the field.
The fieldCompare these two →3:23 faster This athlete2:36 faster -
Osaka30 Jan 2026Doubles Open · Mixed1:12:2395/615Beat 85%
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Yokohama9 Aug 2025Individual Open · Women1:25:2768/304Beat 78%