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Rock Paper Scissors in Japanese: Janken

The country that perfected the game, and the chant the whole world half-remembers.

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What Is Rock Paper Scissors Called in Japan?

In Japanese, Rock Paper Scissors is janken (じゃんけん), and a round of it is started with the chant "jan-ken-pon!" (じゃんけんぽん). You throw your gesture on "pon." If you've ever heard the game called "jan-ken-pon" in English, that's the chant doing the traveling, not the name.

This isn't a quaint localization. Japan is where the game reached its modern form: the rock-paper-scissors triad standardized there in the 19th century before spreading worldwide in the early 20th. The full journey is in our origins of Rock Paper Scissors guide.

The Three Hands in Japanese

  • Guu (グー). Rock. A closed fist; the name mimics the sound-feel of squeezing your hand shut.
  • Choki (チョキ). Scissors. Index and middle finger out; named for the snip-snip sound scissors make.
  • Paa (パー). Paper. An open hand; the sound of a hand flying open.

Notice these aren't the words for "rock," "scissors," and "paper". They're onomatopoeia. The hands are named for how they feel, which is arguably better naming than the English got.

The Full Chant Ritual

A proper game of janken has a script, and everyone in Japan knows it:

  1. "Saisho wa guu" (最初はグー). "starting with rock." Both players pump a fist on the beat to synchronize. This is Japan's version of the priming convention WRPSA rules formalize.
  2. "Jan-ken-pon!". Throw your gesture on "pon," simultaneously.
  3. "Aiko desho!" (あいこでしょ). "it's a tie, right?" On a tie, this chant replays the round immediately, throwing on "sho," and repeats until someone wins. No dithering, no re-priming. It's an elegant tie-break loop.

Janken Runs Daily Life in Japan

In most countries, Rock Paper Scissors settles playground disputes. In Japan, janken is closer to social infrastructure: it decides who goes first, who gets the last piece, who does the chore, batting order in sandlot baseball, and even outcomes on prime-time TV. Where an American might flip a coin, a Japanese group of any age throws janken. Instantly, without discussion, and the result is accepted as final. It's the purest expression of what makes the game special: a provably fair decision that takes two seconds.

What the Rest of the World Calls It

The game has a passport full of names:

  • Japan. Janken (じゃんけん)
  • Korea. Kai bai bo (가위바위보, literally "scissors rock cloth")
  • France. Pierre-feuille-ciseaux ("stone-leaf-scissors")
  • Germany. Schere, Stein, Papier ("scissors, stone, paper")
  • Spanish-speaking countries. Piedra, papel o tijera
  • Italy. Morra cinese ("Chinese morra")
  • Philippines. Bato-bato-pik
  • United States (regional). roshambo, the West Coast name with a famously murky origin story.

Different syllables, same three-way standoff. Whatever you call it, the official rules are the same. And if you want to test your janken against the world, you can play rock paper scissors online against real opponents right now.