Keiichiro Kawaguchi (川口 敬一郎, Kawaguchi Keiichirō, born January 22) is a Japanese animator and director born in Kawasaki, Kanagawa.

Kawaguchi got his start at Ashi Productions and has worked as a key animator and animation director, as well as episode director for many projects. In recent years, he has worked as a sound director and screenwriter for some of the works. Initially, the OVA Pinky:St was supposed to be his first directorial work, but due to production delays, the TV series MÄR was aired before it, resulting in it being his first directorial work instead.^[1]

Kawaguchi is regarded as a quick worker and often directs two or three projects at a time. He also does much of the storyboarding himself. He enjoys collecting figurines and character goods, and his work desk is crammed with toys.^[1] He got into the anime industry because he dreamed of working on plastic models and toyetic anime.^[2]