| Yoshinori Yamaguchi | |
| Native Name Lang: | ja |
| Office: | Governor of Saga Prefecture |
| Term Start: | 14 January 2015 |
| Predecessor: | Yasushi Furukawa |
| Birth Date: | 1965 7, df=y |
| Birth Place: | Iruma, Saitama, Japan |
| Party: | Independent |
| Alma Mater: | University of Tokyo Graduate School for Law and Politics |
is a Japanese politician and the current governor of Saga Prefecture located in Kyushu region of Japan.[1]
On August 12, 2019. the special Natsu no Saga, a documentary on the Zombie Land Saga anime (which takes place in the prefecture), featured Yamaguchi cosplaying as major character Kotaro Tatsumi.[2]