for the benefit of both parties; mutually beneficial
Used to describe actions or situations that are advantageous to both sides. Often appears in business or negotiation contexts.
この契約は両為になるように調整しましょう。
Let's adjust this contract so that it benefits both parties.
両為の解決策を探しています。
We are looking for a mutually beneficial solution.
Compound of 両 (both) and 為 (benefit, sake). The reading だめ is a rendaku form of ため. The exact historical derivation is uncertain, but the word is used in modern Japanese with the meaning 'for the benefit of both parties'.