Shifumi, commonly known as rock-paper-scissors, is a simple hand game often played between two people. Each player simultaneously forms one of three shapes with their hand: a rock (a fist), paper (an open hand), or scissors (a fist with the index and middle fingers extended). The game's outcome is determined by the rules: rock crushes scissors, scissors cut paper, and paper covers rock. This game is frequently used as a decision-making tool or a way to resolve disputes. It is popular in various cultures and can be played casually or competitively. Shifumi is also a common element in games and sports to determine starting positions or other advantages.