noun
narrow-loss ratio; margin-of-loss ratio
Technical term in Japanese electoral politics: the ratio of a losing candidate's vote count to the winner's vote count in a single-seat district, used to rank candidates for proportional representation seats when ties occur.
比例代表の復活当選は惜敗率の高い順に決まる。
Proportional representation revival seats are decided in descending order of the narrow-loss ratio.
彼は小選挙区で負けたが、惜敗率が高かったため比例で当選した。
He lost in the single-seat district, but because his narrow-loss ratio was high, he won a proportional seat.