Chisa Yokoyama (?? ?? Yokoyama Chisa) (born December 20, 1969) is a well known seiy? (voice actress), born in Tokyo. She co-hosts an ongoing radio show with fellow seiy? Kappei Yamaguchi and Sakura Wars creator Ohji Hiroi. She is founder and head of her own voice company called Banbina after leaving Aoni Production. When she was a high school student, she was an assistant of Jump Broadcasting Station of Weekly Shonen Jump (1988-1996).