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Tokyo, Japan.

Discover the best running events in Tokyo, Japan. From local 5Ks to major marathons.

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1 upcoming race

Tokyo Marathon

Plan Your Race

Pace Calculator

Plan your splits and finish time

Predict your time from a recent result

Check your Boston qualifying time

Plan your race-day nutrition

Difficulty Analyzer

Score the course difficulty

Get your VDOT training zones

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Tokyo, Japan Running Events | Marathons and Races | 42Cal | 42Cal