Shibushi Castle (志布志城, Shibushi-jō) was a Muromachi to early Edo period hirajiro-style Japanese castle located in the city of Shibushi, Kagoshima Prefecture, Japan.

At the start of the Kamakura shogunate, Minamoto no Yoritomo assigned the provinces of Satsuma, Ōsumi and Hyūga Province to his retainer Shimazu Tadahisa, who established the vast Shimazu shōen landed estate.

The bay at Shibushi was the main port of that domain and was assigned to the Niiro clan, who built fortifications on all of the hills surrounding the port settlement, which can collectively be called "Shibushi Castle".

The Shimazu ruled Shibushi directly for a short period, but in 1562, taking advantage of the weakened and disordered state of the Shimazu clan, the castle was seized by the neighboring Kimotsuki clan.

While the castle appears to have a flat on ordered arrangement on a plan, each of the enclosures is on a different level, separated by sheer walls and steep slopes.