| Conflict: | Siege of Minamata Castle |
| Partof: | Sengoku period |
| Date: | 16–17 September 1581 |
| Place: | Minamata castle, Higo Province |
| Map Type: | Japan Kumamoto Prefecture#Japan |
| Map Relief: | yes |
| Result: | Shimazu victory |
| Combatant1: | Shimazu clan |
| Combatant2: | Ōtomo clan Sagara clan |
| Commander1: | Shimazu Toshihisa Shimazu Iehisa Niiro Tadamoto Uwai Kakuken |
| Commander2: | Sagara Yoshihi |
| Strength1: | 115,000[1] |
| Strength2: | 700 |
The siege of Minamata Castle was a short siege of the castle of Minamata.
Minamata was the entry point for the Ōtomo lands in Higo province, the castle was guarded by Sagara Yoshihi with 700 soldiers.[2]
When Shimazu Toshihisa and Iehisa encamped near the castle with 115,000 men, Yoshihi was forced to surrender.[3]
Later, Yoshihi was killed in a surprise attack by Kai Soun's army in the Battle of Hibikinohara.[4]