noun
constructive relationship
A relationship characterized by positive, productive, and cooperative interaction, often used in diplomatic, business, or interpersonal contexts.
両国は建設的関係を築くことで合意した。
The two countries agreed to build a constructive relationship.
上司と建設的関係を保つことは重要だ。
It is important to maintain a constructive relationship with your boss.
Compound of 建設的 (constructive) + 関係 (relationship). The exact historical derivation is uncertain; the term is a straightforward modern compound.