合ごう意いの上うえ

expression, noun, adverb

by mutual agreement; by mutual consent

Used when both parties have agreed to something, often in formal or legal contexts.

• 契けい約やくは合ごう意いの上うえで解かい除じょされた。

  The contract was terminated by mutual agreement.

• 合ごう意いの上うえでなければ、この変へん更こうは無む効こうです。

  This change is invalid unless it is by mutual consent.