Makoto Sumikawa (澄川 真琴, Sumikawa Makoto; born March 31, 1964 in Osaka, Osaka Prefecture, Japan), also known as Jun Koyamaki (高野槇 じゅん, Kōyamaki Jun), is a Japanese actress and voice actor. From Osaka Prefecture, her real name is Takayo Sunagawa, and her maiden name Sumikawa. Her husband is Shingo Sunagawa of the original JAC Brothers.