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Athlete Japan

由布幸 石川

由布幸 石川 has raced HYROX 3 times since 2025, all in the women's Individual Open. 1:55:39 at Chiba 2026 is the fastest of 3, 475th of 589 women. On the clock, that is 13:08 faster than the first of them, at Yokohama 2025.

Best finish, by category
Individual Open · Women
1:55:39
Chiba 2026

Progress against the field

From Yokohama 2025 to Chiba 2026, 由布幸 石川 got 7:07 faster than the field.

The clock says 13:08 faster, but the races themselves got 6:01 quicker for everyone.

Time ahead of the field Up is better
Yokohama 2025 Chiba 2026

188 days between Osaka 2026 and Chiba 2026 is the longest gap compared here, and the second race was 15:12 better than the field.

Race by race, in the list below ↓
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.

Every race

3 races · 3 events

  1. Chiba
    6 Aug 2026
    Individual Open · Women
    1:55:39 PB
    475/589
    Beat 19%
    ↑ 188 days after Osaka 2026 15:12 better than the field Why ↓

    15:12 better than the field: 17:50 faster on the clock, against 2:38 faster for everyone.

    Compare these two →
  2. Osaka
    30 Jan 2026
    Individual Open · Women
    2:13:29
    575/619
    Beat 7%
    ↑ 174 days after Yokohama 2025 8:05 worse than the field Why ↓

    4:42 slower on the clock in a race that was 3:23 faster for everyone: 8:05 lost to the field.

    Compare these two →
  3. Yokohama
    9 Aug 2025
    Individual Open · Women
    2:08:47
    285/304
    Beat 6%

Personal bests, by station

5:51
Chiba 2026
4:19
Yokohama 2025
11:45
Osaka 2026
9:19
Chiba 2026
5:55
Osaka 2026
4:00
Yokohama 2025
6:45
Chiba 2026
9:55
Chiba 2026

Station by station, race by race

Individual Open · Women Faster is lower
1000m SkiErg
6:38 5:51
50m Sled Push
5:04 4:19
50m Sled Pull
14:03 11:45
80m Burpee Broad Jump
12:09 9:19
1000m Row
6:42 5:55
200m Farmers Carry
5:11 4:00
100m Sandbag Lunges
9:48 6:45
Wall Balls
15:26 9:55