Johnson Power Rankings
The world authority on 200+ mile ultramarathon running — weekly, data-driven, course-difficulty-adjusted.

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Koichi Iwatate

Men · Asia · b. 1971 (50-59)

Also seen as: Iwatate, Koichi

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen965100• new
OverallMen965090• new
Multi-day / TimedMen22682• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 3 in-window performance scores (highlighted below). Each score = base × difficulty × field-strength × quality.

Career results (200+ mile tier)

River Road Foot Race 514km · Apr 30, 2023 · 318.76mi continuous
place 5 · 3d 17:44:41 · difficulty 1.14 · field 0.42 · quality 0.74
353
River Road Foot Race 514km · Apr 30, 2022 · 318.76mi continuous
place 6 · 3d 16:10:12 · difficulty 1.14 · field 0.41 · quality 0.78
368
(race) · · ?mi counts toward rating
place 7 · 1d 11:55:19 · difficulty ? · field ? · quality 0.62
154
(race) · · ?mi
place 3 · 1d 18:04:52 · difficulty ? · field ? · quality 0.76
186
(race) · · ?mi counts toward rating
place 8 · 1d 19:26:02 · difficulty ? · field ? · quality 0.71
175
(race) · · ?mi counts toward rating
place 10 · 1d 16:23:44 · difficulty ? · field ? · quality 0.66
165
(race) · · ?mi
place 20 · 1d 04:16:01 · difficulty ? · field ? · quality 0.51
126
(race) · · ?mi
place 5 · 1d 03:36:00 · difficulty ? · field ? · quality 0.90
222
(race) · · ?mi
place 15 · · difficulty ? · field ? · quality 0.35
28
(race) · · ?mi
place 9 · · difficulty ? · field ? · quality 0.29
24
(race) · · ?mi
place 22 · · difficulty ? · field ? · quality 0.26
22
(race) · · ?mi
place 1 · · difficulty ? · field ? · quality 0.38
32
(race) · · ?mi
place 10 · · difficulty ? · field ? · quality 0.30
24