Kotono Mitsuishi is a Japanese voice actress and narrator from Toda, Saitama. She was affiliated with Arts Vision and Lasley Arrow. As a young girl, Mitsuishi lived in Nagareyama, Chiba. Mitsuishi graduated from high school in 1986, and entered the Katsuta Voice Actor's Academy. In 1988, Mitsuishi made her voice acting debut as Tomoyo in the OVA Ace wo Nerae! 2.