Where did Rock Paper Scissors originate?

Rock Paper Scissors most likely originated in China during the Han Dynasty (206 BC – 220 AD). The earliest documented version is called Shoushiling, a hand game with three gestures in a circular dominance system. It reached Japan by the 17th century, where it became known as jan-ken-pō, and spread to the West in the late 19th and early 20th centuries.

What does jan-ken-pō mean?

Jan-ken-pō (じゃんけんぽん) is the Japanese name for Rock Paper Scissors. 'Jan-ken' refers to the game itself and 'pō' is an exclamation at the moment of reveal. The terms 'guu' (rock), 'choki' (scissors), and 'paa' (paper) are the gesture names in Japanese.

Is Rock Paper Scissors truly random?

Against a computer that chooses randomly, yes. Against humans, no. Research shows players have predictable biases: winners tend to repeat the winning gesture, losers shift in the direction the rules suggest (after losing to scissors, players often switch to rock). Beginners also throw rock more often than the other gestures, and men throw rock more than women on average.

When did Rock Paper Scissors become popular in the West?

RPS was introduced to the West primarily through Japanese influence in the early 20th century. The first English-language description of the game appeared in 1924. It became widespread in Western countries throughout the mid-20th century, and by the 1990s was fully mainstream. The World RPS Society was established in 2002.

The History of Rock Paper Scissors: 2,000 Years of a Hand Game

Origins in Han Dynasty China

The earliest documented ancestor of Rock Paper Scissors is a Chinese hand game called Shoushiling (手勢令), described in texts from the Han Dynasty period (206 BC – 220 AD). The game used three elements — frog, slug, and snake — in a circular dominance relationship: the frog eats the slug, the slug poisons the snake, the snake eats the frog. This is structurally identical to Rock Paper Scissors: three options, each defeating one and losing to another.

Another documented version from the same era used different animals: the tiger, tree, and chief (a village elder). The tiger fears the chief, the chief fears a tree, the tree fears the tiger. Same logic, different symbols.

Japan: Jan-ken-pō and formalization

The game reached Japan some time during the 17th century, likely through trade routes. By the Edo period (1603–1868) it was well documented under the name jan-ken-pō (じゃんけんぽん). The Japanese version standardized the three gestures that persist today:

Guu (グー) — closed fist, Rock
Choki (チョキ) — index and middle fingers extended, Scissors
Paa (パー) — open hand, Paper

Japan is also responsible for standardizing the chant — "jan, ken, pō" — which signals the simultaneous reveal. This ritual element (counting down together before the reveal) is arguably one of the reasons the game spread so effectively: it's self-regulating and requires no referee.

Arrival in the West

RPS first appeared in Western print in 1924, in an article about Japanese children's games published in London. It was noted as a curiosity, an unusual foreign game. In the following decades it spread through schools in the United Kingdom and United States, often under names like "Paper Stone Scissors" or "Scissors Paper Stone."

By the 1950s, it was mainstream in English-speaking countries. By the 1980s, it had spread throughout Europe, Australia, and Latin America. Today, almost every culture on earth has a version of the game.

Timeline: 2,000 years at a glance

~200 BC

Han Dynasty China: Shoushiling and similar 3-gesture games documented in Chinese texts.

17th century

Game reaches Japan via trade. Evolves into jan-ken-pō with standardized gestures and chant.

1924

First English-language description of the game appears in print in Britain.

1950s–70s

Spreads through Western schools. Adopted as a universal tiebreaker across cultures.

2002

World RPS Society holds its first official World Championship in Toronto, Canada.

2005

Christie's auction house uses RPS to decide which firm gets a $20M art sale commission. Paper wins.

2011

Rock Paper Scissors Lizard Spock goes viral following its appearance on The Big Bang Theory, introducing millions to the 5-gesture variant.

Why humans are predictable at RPS

Against a computer choosing randomly, RPS is a 33/33/33% coin flip with no optimal strategy. Against humans, it's a different game entirely. Research from Zhejiang University (2014) involving 360 players in repeated RPS games found consistent patterns:

Win-stay tendency: Players who win a round tend to repeat the winning gesture more often than chance would predict.
Lose-shift tendency: Players who lose tend to shift to the next gesture in the sequence Rock → Paper → Scissors → Rock.
Rock bias: Among first-time or novice players, rock is thrown more frequently than the other two. It may be associated with strength or a default fist posture.
Gender differences: Men throw rock more than women on average; women use scissors slightly more.

Expert players exploit these patterns. The best competitive RPS players essentially play a meta-game of psychology: what does my opponent think I will throw, and what gesture beats the thing they'll throw to beat that?

RPS in competitive sport

The World RPS Society, founded in Canada in 2002, established official tournament rules and has run annual World Championships. Participants from dozens of countries compete in bracket-style tournaments, and the mental game is taken seriously. Players study opponent tendencies, use deliberate tells, and attempt to manipulate behavior through eye contact and posture.

Japan has its own national competitions with enormous prize pools relative to most hand games. In 2006, a Japanese variety show created a competition where players competed for over $100,000 in prizes. The audience's role in such shows — shouting gestures at their screens to "help" their favorite — shows how deeply embedded the game is in Japanese culture.

RPS in popular culture and legal decisions

Beyond sport, RPS has been used in surprisingly official contexts. In 2005, when Christie's and Sotheby's — two rival auction houses — both bid for the right to handle a $20 million art collection, the client asked them to settle it with a single game of Rock Paper Scissors. Christie's won with Paper over Rock. Sotheby's had chosen Rock on the advice of their client's 11-year-old daughter.

In 2006, a US federal judge ordered two opposing parties in a lawsuit to resolve a procedural dispute via RPS. The judge's order — citing the parties' inability to cooperate on minor scheduling — is one of the only known instances of a court-ordered hand game.

Want to experience the psychology yourself? Play Rock Paper Scissors against our AI and see if you can beat the pattern-detection algorithm.

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