noun
San'yō region
A region of western Honshu including Okayama, Hiroshima, southern Yamaguchi, and sometimes western Hyogo prefectures.
山陽地方は瀬戸内海に面している。
The San'yō region faces the Seto Inland Sea.
San'in region on the Sea of Japan side of western Honshu, contrasting with San'yō on the Seto Inland Sea side.
From the historical provinces of San'yōdō (山陽道), referring to the 'sunny side' of the mountains.