Stone Fist

Japanese: 石拳 - いしけん

〘noun〙 A type of recreational fist game . Two or more people use one hand to imitate the shapes of rock, paper, or scissors, and simultaneously produce one of these shapes to decide the winner. Usually, rock beats scissors, scissors beats paper, and paper beats rock. It is also used as a simple way to decide the order of things. Janken. Ishi. Ishikami. *Fuzoku Gaho - Issue 60 (1893) Yugeimon "The four types of fist games used in the three-way standoff are Insect Fist, Stone Fist, Fox Fist, Tiger Fist, and more."

Soap fist [Stone fist]

〘 noun 〙 A fist as hard as stone. ※Tokyo Shin Hanjō-ki (1874-76)〈Hattori Seiichi〉First: “The iron-armed stone fist, using all forty techniques and mastering eighty techniques, truly fought a battle between two tigers.”

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙遊びの拳(けん)の一種。二人以上の者が、片手で、石、紙、はさみの形をまねて、同時にそのいずれかの形を出して勝負を決める。普通、石ははさみに勝ち、はさみは紙に勝ち、紙は石に勝つ。物事の順序などを決める簡便な方法としても行なわれる。じゃんけん。いし。いしかみ。※風俗画報‐六〇号（1893）遊芸門「三竦みの拳は蟲拳石(イシ)拳、狐拳虎拳の四種とす」