When Minehira TACHIBANA was 38 years old, he was implicated in his elder brother Shigemoto TACHIBANA's arrest in a purge and banished to an isolated island off the Genkainada coast (Kyushu area) called Daijajima island (Oronoshima island).
立花峯均38歳のとき、兄・立花重根が逮捕粛清された事件に連座して、玄界灘の孤島・大蛇島（小呂島）へ流罪となった。