expression, noun, adverb
by mutual agreement; by mutual consent
Used when both parties have agreed to something, often in formal or legal contexts.
契約は合意の上で解除された。
The contract was terminated by mutual agreement.
合意の上でなければ、この変更は無効です。
This change is invalid unless it is by mutual consent.
同意の上 also means 'with consent', but 合意の上 emphasizes a mutual agreement between parties, often in formal settings.
Compound of 合意 (agreement) + の (possessive particle) + 上 (on the basis of).