Yamaguchi (山口市 Yamaguchishi) is the capital city of Yamaguchi Prefecture, Japan.
On April 1, 1944, Yamaguchi (1st Generation) merged with Otoshi, Hirakawa, Aiofutajima, Natajima, Sue, Ogori, Ajisu, Kagawa and Sayama (all from the former Yoshiki District) to form the new city of Yamaguchi (2nd Generation).
On October 1, 2005, Yamaguchi (2nd Generation) merged with the remaining parts of Yoshiki District (Dissolved by this action) and the town of Tokuji from Saba District (also dissolved by this action) to form the new city of Yamaguchi (3rd Generation).