JA
部屋の中の象 部屋の象 見て見ぬふり
EN
The expression “the elephant in the room” is a metaphorical idiom in English for an important or enormous topic, question, or controversial issue that is obvious or that everyone knows about but no one mentions or wants to discuss because it makes at least some of them uncomfortable and is personally, socially, or politically embarrassing, controversial, inflammatory, or dangerous.
Wikipedia