Mutsuki Iwanaka (岩中 睦樹, Iwanaka Mutsuki, born January 7) is a Japanese voice actor from Fukuoka Prefecture, Japan, affiliated with Mausu Promotion. He speaks the Kitakyushu and Hakata dialects.

After graduating from Fukuoka School of Music & Dance College in 2014, he joined the actor training center attached to Mausu Promotion. From around 2015, he appeared mainly as a background character in animes and games. He became affiliated with Mause Promotion in April 1, 2016. In 2017, he got his first semi-regular character in the TV anime Tsuki ga Kirei in the role of Daisuke Tachibana.