San'indō

[2] San'in translates to "the shaded side of a mountain", while dō, depending on the context, can mean either a road, or a circuit, in the sense of delineating a region.

From there it followed the coast of the Sea of Japan to Hagi, near Shimonoseki, the western terminus of both the San'yōdō and the San'indō, and very near the westernmost end of the island of Honshū.

Though the road originally terminated in the west at Hagi, the lords of Chōshū Domain at some point during the Edo period changed it to end at Yamaguchi.

The road served an important strategic and logistical role in a number of military situations over the course of the years.

The road also served the more everyday purpose of providing transport for merchants, traveling entertainers, pilgrims and other commoners.