Yuin is a seal that has no character belonging to any individuals or corporations such as full name, gago (pseudonym), trade name and yago (shop name), but has inmon (words or symbols engraved on the seal) curved.
遊印（ゆういん）とは、姓名や雅号、商号や屋号など特定の個人や法人に帰属しない文字を印文にした印章のことである。