Who's running in Saitama right now

About this number

We estimate how many people are running in Saitama right now (population 7,318,000) with a Fermi estimate that multiplies the runner participation rate, weekly frequency and session length by the local time, day of week, weather and season. It isn't a precise measurement, but it rises around 6am and drops on rainy days and late at night — close to how it actually feels.

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