noun, noun or participle which takes 'suru', transitive verb
exile to an island; banishment
Historically, a punishment of sending someone to a remote island. In modern use, it can figuratively mean being sent to an isolated or undesirable post.
江戸時代、罪人は島流しにされることがあった。
In the Edo period, criminals were sometimes exiled to islands.
彼
He was banished to a regional branch office of the company.