Dry riverbed slope (Kawara-zaka)
Near the current Unoki is, a long time ago, because there was a dry riverbed of the Tama River, there is a dry riverbed of the place name.
Origin of the hill name is due to be a slope out to the dry riverbed.
Now is "Kiridoshi pass", that is a gradual, previously in even narrow steep roads, carts to traffic the field was the affliction.
川原坡