noun
Tōsandō (historical region)
Historical administrative region of Japan, located between the Tōkaidō and Hokurikudō. Used in historical contexts.
東山道は、古代日本の行政区画の一つである。
Tōsandō is one of the administrative divisions of ancient Japan.
From 東山 (eastern mountains) + 道 (administrative region). The exact historical derivation is uncertain; the name refers to the mountainous area between the Tōkaidō and Hokurikudō.