An Izakaya was sued for reasons that store's appearance is very similar.
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There is no concept like a trade dress in Japanese law.
Therefore, even if the store's appearance is very similar, it is impossible to sue the counterparty.
Recently, there was a decision of a Court that granted an injunction based on unfair competition prevention law against such a situation.
So, Yossix who runs a Izakaya(Japanese pub) sued SPFdining which runs another pub, claiming that similar signs and the like are in violation of the Unfair Competition Prevention Law.