| Makoto Hamaguchi | |
| Native Name: | 濱口誠 |
| Native Name Lang: | ja |
| Office: | Member of the House of Councillors |
| Term Start: | 2016 |
| Predecessor: | Masayuki Naoshima |
| Birth Date: | 18 May 1965 |
| Party: | Democratic Party for the People |
Makoto Hamaguchi is a Japanese politician who is a member of the House of Councillors of Japan.
He was born on May 18, 1965, in Mie Prefecture. From 1988 to 2015, he worked for Toyota. He was elected in 2016, succeeding Masayuki Naoshima, and re-elected in 2022 as member of party list.[1]