[じゅうふくりっこうほ, juufukurikkouho] (n) simultaneously running for a seat in a single-member constituency and a seat in a proportionally representated constituency
[しょうせんきょくひれいだいひょうへいりつせい, shousenkyokuhireidaihyouheiritsusei] (n) electoral system comprised of single-seat constituencies and proportionally represented multiple-seat constituencies
[せきはいりつ, sekihairitsu] (n) ratio of the margin of loss of an electoral candidate in a single-constituent district (used to break ties when determining the representative of a proportionally represented district)
[ふっかつとうせん, fukkatsutousen] (n, vs) failing to win an electoral seat in a single-member constituency, but winning a seat in a proportionally represented constituency