Sumio
Sumio is a masculine Japanese given name. Notable people with the name include:
- Sumio Endo, Japanese judoka
- Sumio Iijima, Japanese physicist
- Sumio Kobayashi, Japanese classical composer
- Sumio Mabuchi, Japanese politician
- Sumio Miwa, Japanese racewalker
- Mori Sumio, Japanese poet
- Sumio Shiratori, Japanese composer and music producer