Kumagai (written: 熊谷 lit. "bear valley"), also transliterated as Kumagae, is a Japanese surname. Notable people with the surname include:
, Japanese footballer Goro Kumagai (熊谷吾良, 1932–2017), Japanese printmaker, educator , Japanese writer , Japanese tennis player , Japanese footballer , Japanese actress , Japanese footballer Mie Kumagai, Japanese video game producer , Japanese photographer , Japanese kickboxer , Japanese soldier Noriaki Kumagai (born 1970), Japanese drummer , Japanese footballer who plays in the English, Women's Super League , Japanese voice actor , Japanese voice actor
Fictional characters: , character in the manga series Binbō-gami ga!
See also , eighth of the sixty-nine stations of the Nakasendō Kumagai Gumi, Japanese construction company