山さん陰いん道どうさんいんどうMeanings1nounSan'indō; San'in provincehistorical termHistorical term for one of the old provinces of Japan, roughly corresponding to the modern San'in region (Tottori, Shimane, and northern Yamaguchi). Used in historical contexts.See also: 山陰地方山さん陰いん道どうは、古