| Conflict: | Siege of Kōriyama Castle |
| Partof: | Sengoku period |
| Date: | 1544 |
| Place: | Kōriyama Castle, Kagoshima Prefecture |
| Result: | Shimazu victory |
| Combatant1: | Shimazu clan |
| Combatant2: | Iriki-In clan |
| Commander1: | Shimazu Takahisa |
| Commander2: |
The siege of Kōriyama Castle was fought in the 1544. The Iriki were vassals of the Shimazu clan and Iriki-In Shigetomo was the brother-in-law of Shimazu Takahisa. However relations began to sour when rumors spread that Shigetomo was plotting a rebellion against Takahisa. In 1544 Shigetomo died and shortly after Takahisa attacked and captured his castle of Kōriyama, ending any menace the Iriki-in could pose to his rule. Iriki-in Shigetsugu succeeded Shigetomo and the relations were later restored between both sides.