noun
hand game (e.g. rock-paper-scissors)
Refers to games decided by hand gestures, especially in the context of じゃんけん and similar contests.
See also: じゃんけん
じゃんけんは日本の代表的な拳の一つだ。
Rock-paper-scissors is one of the representative hand games in Japan.
The kanji 拳 originally means 'fist' and is used here in the sense of hand gestures for games. The exact derivation of this usage is uncertain.