Ri — The Distance Walked in an Hour

An Article by Craig Mod
Image from craigmod.com on 2021-02-25 at 10.05.32 AM.jpeg

A ri is a unit of measure, it’s about how far a person can walk in an hour at a reasonable pace. It clocks out at roughly 3.93 kilometers.

Remnants of the ri system are scattered along the old roads of Japan. During the Edo period, ri were marked recurrently by hulking earthen mounds that flanked the road — ichi-ri zuka, “one-ri mounds.” There are only a handful of “originals” left. When you pass one with an old cypress or oak growing from its center it becomes a tiny moment of celebration.