Aio, Yamaguchi
Aio was a town located in Yoshiki District, Yamaguchi Prefecture, Japan.
As of 2003, the town had an estimated population of 7,801 and a density of 323.83 persons per km2. The total area was 24.09 km2.
On October 1, 2005, Aio, along with the town of Tokuji, and the towns of Ajisu and Ogōri, was merged into the expanded city of Yamaguchi.