| Eiji Kidoguchi | |
| Native Name: | 木戸口英司 |
| Native Name Lang: | ja |
| Office: | Member of the House of Councillors |
| Term Start: | 2016 |
| Term End: | 2022 |
| Term Start1: | 2024 |
| Party: | Constitutional Democratic Party |
Eiji Kidoguchi is a Japanese politician who is a member of the House of Councillors of Japan,[1] serving for the Iwate at-large district as a member of the Constitutional Democratic Party of Japan. Kidoguchi was first elected in 2016,[2] [3], but lost the seat in 2022. Kidoguchi won the seat back in by-election in 2024 after the resignation of the incumbent, Megumi Hirose.[4]