This road was refurbished when Kanamori entered the province of Hida. It connected Toyama Prefecture (then known as Etchu) and Takayama. In the province of Etchu, the road was known as the Hida Trail, and in the Hida province it was known as the Etchu Trail. The Hida Trail is also sometimes called the Yellowtail Trail. During the Edo Period the road served as the channel for travelers and goods between Etchu and Hida; from Etchu came rice, fish(mainly Yellowtail) and salt, while from Hida went paper mulberry, lacquer and wooden planks. The old post towns of Takayama, Furukawa, Hagiwara, and Kanayama dot the present day Route 41.