was a Japanese samurai of the Sengoku period, who ruled Kutsukidani Castle in Ōmi Province. He was a supporter of the shōgun Ashikaga Yoshiharu.
Harutsuna's descendants became daimyō in the Edo period. The Kutsuki were a powerful clan at Kutsuki-tani (朽木谷), Takasima-gori, Ōmi Province.