Edo: Convert Meters to Ri, Chō, and Ken

1 ri is calculated as 3927.2688 m, based on the conversion 1 ri = 36 cho = 2,160 ken. In the Edo period, 1 ri was the distance one could walk in half a koku (approximately one hour). Therefore, the actual distance varied depending on the region and location. It may have been a convenient unit for traveling. For reference, I calculated the number of steps based on the stride length.