The Kisoji (木曽路, Kisoji) was an old trade route in the Kiso Valley that stretched from Niekawa-juku in Nagano Prefecture to Magome-juku in Gifu Prefecture. There were eleven resting spots along the route, all of which became part of the Nakasendō when it was established.[1] There is an article dating from 713 in the Shoku Nihongi that records the route’s characters as 吉蘇路.
There are two stone markers that indicate the end points of the Kisoji. One is located between Motoyama-juku and Niekawa-juku and states "From here south: Kisoji" (是より南 木曽路 Kore yori minami, Kisoji). The other marker is located between Magome-juku and Ochiai-juku and states, "From here north: Kisoji" (是より北 木曽路 Kore yori kita, Kisoji).