Oshu Dochu (Kaido) is an eighty-nine highway starting from Oshu Shirakawa to Minmaya in Aomori Prefecture. It is also called Sendai, Matsumae-do, Oshu-do, etc. It was the main road of Oshu in the early modern times. It is called a side highway for the five highways, but it was a comparable highway as a major highway, regardless of the operation of the highway, traffic volume, and transportation facilities. It seems to have the same route as the ancient Higashiyama road (Tosando) and the medieval Okudado (Odaido), but as can be seen in the decision of the town and the route of each lodging station, it was developed as a new highway in the early modern era It is good to say.