The geography and administrative subdivisions of Japan have evolved and changed during the course of its history. These were sometimes grouped according to geographic position.[1][2]
Tōkaidō literally means 'Eastern Sea Way'.[3] The term also identifies a series of roads connecting the 15 provincial capitals of the region.[4]
The Tōsandō is a region which straddles the central mountains of northern Honshū.[5] The descriptive name also refers to a series of roads connecting the provincial capitals.[4] Tōsandō included Musashi Province after 711.[5]