San'yō, Okayama

San'yō (山陽町 San'yō-chō) was a town located in Akaiwa District, Okayama Prefecture, Japan.

As of 2003, the town had an estimated population of 24,939 and a density of 719.95 persons per km². The total area was 34.64 km².

On March 7, 2005, San'yō, along with the towns of Akasaka, Kumayama and Yoshii (all from Akaiwa District), were merged to create the city of Akaiwa.