Seijin
| Gender | Male |
|---|---|
| Origin | |
| Word/name | Japanese |
| Meaning | Different meanings depending on the kanji used |
Seijin (written: 誠人 or 誠仁) is a masculine Japanese given name. Notable people with the name include:
- Seijin Noborikawa (登川 誠仁; 1932–2013), Japanese musician and singer
- Seijin Oikawa (及川 誠人; born 1970), Japanese motorcycle racer