| Conflict: | Siege of Oguchi Castle |
| Partof: | Sengoku period |
| Date: | 1569 |
| Place: | Oguchi castle, Ōsumi Province |
| Result: | Shimazu victory |
| Combatant1: | Shimazu clan |
| Combatant2: | Hishikari clan |
| Commander1: | Shimazu Takahisa Shimazu Yoshihisa |
| Commander2: | |
| Strength2: | 8000[1] |
The siege of Oguchi Castle was fought in the year of 1569 when forces of the Shimazu clan besieged the Hishikari clan's castle of Oguchi in Ōsumi Province. The siege was successful and the castle fell to the Shimazu.