A marriage arranged for political reasons or convenience, aimed at gaining power or alliances rather than love (yojijukugo).
王家どうしの政略結婚で国同士の同盟が強化された。
A political marriage between royal families strengthened the alliance between the countries.
彼らの結婚は表向きは幸福そうだが、実際は政略結婚だった。
Their marriage looks happy outwardly, but in reality it was a marriage of convenience for political reasons.
近代では個人の意思を尊重するため、政略結婚は減少したと言われる。
It is said that political marriages have decreased in modern times as individual choice is respected.