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

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Gen Yamakoshi

Men · Asia · b. 1969 (50-59) · provisional rating

Also seen as: Yamakoshi, Gen

Ratings

Athlete ratings by board
BoardGenderRatingRankMove
ContinuousMen994984• new
OverallMen994976• 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 counts toward rating
place 15 · 1d 01:53:54 · difficulty ? · field ? · quality 0.80
195
(race) · · ?mi counts toward rating
place 3 · 1d 20:25:54 · difficulty ? · field ? · quality 0.82
213