門かど違ちがい

noun

barking up the wrong tree; calling at the wrong house

Used when someone's approach, target, or assumption is mistaken; often appears in the set phrase お門違い (o-kadochigai) with the honorific prefix.

See also: お門違い

• 彼かれに文もん句くを言いうのはお門かど違ちがいだよ。

  Complaining to him is barking up the wrong tree.

• その苦く情じょうはうちの部ぶ署しょではなく、お門かど違ちがいです。

  That complaint is for the wrong department; you're calling at the wrong house.