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]