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

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Koichi Hasegawa

Men · Asia · b. 1972 (50-59) · provisional rating

Also seen as: Hasegawa, Koichi

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen588593• new
OverallMen588584• new

Why this rank

The Overall rating is the time-decayed mean of this athlete’s best 2 in-window performance scores (highlighted below). Each score = base × difficulty × field-strength × quality.

Career results (200+ mile tier)

(race) · · ?mi
place 25 · 1d 05:15:50 · difficulty ? · field ? · quality 0.48
117
(race) · · ?mi counts toward rating
place 18 · 1d 21:28:17 · difficulty ? · field ? · quality 0.52
127
(race) · · ?mi counts toward rating
place 12 · 1d 20:47:35 · difficulty ? · field ? · quality 0.52
127