noun
rugby sevens; seven-a-side rugby
Refers to the variant of rugby union with seven players per side. Also known as セブンズ.
See also: セブンズ
オリンピックで7人制ラグビーが正式種目になった。
Rugby sevens became an official event at the Olympics.
Standard spelling using Arabic numeral.
Kanji numeral variant; less common but still seen.
Compound of 七人 (seven people), 制 (system), and ラグビー (rugby).