Comparison of past and present administrative divisions of Japan

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.
Tōkaidō.
The "Tōkaidō"' is a region; and its name literally means 'Eastern Sea Way'. The term also identifies a series of roads connecting the 15 provincial capitals of the region.
Tōsandō.
The "Tōsandō" is a region which straddles the central mountains of northern Honshū. The descriptive name also refers to a series of roads connecting the provincial capitals. Tōsandō included Musashi Province after 711.