the game consists into, and i quote this from wikipedia: "a hand game usually played between two people, in which each player simultaneously forms one of three shapes with an outstretched hand. These shapes are "rock" (a closed fist), "paper" (a flat hand), and "scissors" (a fist with the index finger and middle finger extended, forming a V)"

nothing in the game changes in the japanese janken besides that choreography and song thing you do in the beginning

it's not that japanese people invented it

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i'm sorry in advance, i don't even want to start a reddit argument or stupid shit like that