Kutsuki Harutsuna (朽木 晴綱, 1518–1550) 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.
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