Itoyama

Itoyama (written: 糸山 or 絲山) is a Japanese surname. Notable people with the surname include:


 * Akiko Itoyama (絲山 秋子), Japanese writer
 * Eitaro Itoyama (糸山 英太郎), Japanese businessman and politician
 * Mayo Itoyama (糸山 真与), Japanese synchronized swimmer
 * Takashi Itoyama (糸山 隆司), Japanese basketball player