Imanishi (written: 今西) is a Japanese surname. Notable people with the surname include:
, Japanese football player and manager , Japanese ecologist and anthropologist , Japanese ceramic artist , Japanese tennis player
See also Thereza Imanishi-Kari, Brazilian associate professor of pathology of Japanese descent Imanishi Family Residence, one of a Group of Traditional Buildings in Imai-cho, Kashihara, Nara Prefecture, Japan