Masamoto
| Gender | Male | 
|---|---|
| Origin | |
| Word/name | Japanese | 
| Meaning | Different meanings depending on the kanji used | 
Masamoto (written: 政基, 政元 or 正甫) is a masculine Japanese given name. Notable people with the name include:
- Hosokawa Masamoto (細川 政元; 1466–1507), Japanese daimyō
 - Inoue Masamoto (井上 正甫; 1778–1858), Japanese daimyō
 - Kujō Masamoto (九条 政基; 1445–1516), Japanese kugyō
 - Masamoto Yashiro (八城 政基; born 1929), Japanese businessman