Place · region

San'yō region

The San'yō region is the part of western Honshu, Japan, facing the Seto Inland Sea, comprising today's Okayama and Hiroshima prefectures and the south of Yamaguchi. Its name means 'the sunny side of the mountains', in contrast to the San'in region. The San'yōdō highway ran through it, and in the Sengoku period it was contested by the Ōuchi, Amago and Mōri clans.

San'yō region
Image: Koba-chan at Japanese Wikipedia · CC BY-SA 3.0 · Wikimedia Commons

Mentioned in 1 state history

Amago clan domain

See also

Cite this entry
APA
The Epoch Institute. (2026). San'yō region. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/sanyo-region
MLA
“San'yō region.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/sanyo-region. Accessed .
Chicago
The Epoch Institute. “San'yō region.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/sanyo-region.
Harvard
The Epoch Institute (2026) ‘San'yō region’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/sanyo-region (Accessed: ).

Last reviewed October 2026Random entry ↻