The Traditions of Mahjong

A Hong Kong auntie playing at a marble table in Sheung Wan, a Riichi pro at a black-felt automatic table in Akihabara, a grandmother teaching her grandchildren at a Long Island kitchen counter, and a college student in Taipei playing for plum-flavored snacks are all playing mahjong. They are playing different games.

This page is a map of those games — the six major living traditions of mahjong, and the regional variations clustered around them. Each carries its own scoring, its own rituals, its own accessories, and its own particular pleasure. Knowing which one you're playing is the difference between a wonderful evening and a confusing one.

Mahjong was born in late-Qing China and remains, in many forms, fundamentally a Chinese game. Within the Chinese cultural sphere alone, three distinct traditions are played at scale today.

The ancestral form. This is the mahjong played in the late 1800s and early 1900s, refined in the cities of the Yangtze Delta, and the version Joseph Babcock simplified for Americans in 1920. A full 144-tile set with all three suits, winds, dragons, flowers, and seasons. Scoring works by counting base points (fu) and then doubling for each faan — a feature of the hand such as a dragon triplet or all-one-suit. Limit hands — Big Three Dragons, Four Winds, Thirteen Orphans, Nine Gates, Heavenly Hand — lock at the table maximum.

Today Classical is preserved more in scholarship than at active tables. Most players who say "Chinese mahjong" actually mean Hong Kong Old Style. But Classical is the source from which the rest of the family flows.

Best for: Players curious about the historical roots. Many classical hands appear, with modification, across every other Chinese-derived variant.

Tile set: Standard 144-tile bone-and-bamboo or melamine. No jokers.

The most-played form of mahjong in the world, by some margin. HKOS is the mahjong of Hong Kong, Macau, southern China, and the global Cantonese diaspora — from San Francisco's Chinatown to Sydney's Chatswood to London's Soho.

HKOS streamlines the Classical scoring by dropping the base-point calculation and counting only faan. A hand must reach a minimum number of faan to declare a win — usually three — and most house rules cap scoring at thirteen faan (the value of a limit hand). Faan are earned for the familiar features: dragon pungs (1), seat or round-wind pungs (1), all chows (1), all pungs (3), half flush (3), full flush (6), and so on up to the limit hands.

The signature feature of HKOS is discarder-pays-all: when a player wins on someone else's discard, that discarder pays the full score to the winner alone. When a player wins on a self-draw, all three opponents pay. This single rule shapes nearly every strategic decision in the game.

HKOS is played fast, loud, and sociably. Hong Kong mahjong parlors operate under government license from noon to midnight; family games at home routinely run from dinner well past midnight, paused only for tea and snacks. The clack of HKOS at full speed is one of the great sounds of Cantonese domestic life.

Best for: Players who want the real, full-blooded, traditional Chinese game — and who want the version their friends and relatives across the diaspora are most likely to know.

Tile set: Standard 144-tile set including flowers and seasons. No jokers. A traditional wood, bamboo, or rosewood case is part of the aesthetic.

In 1998, the General Administration of Sport of China codified mahjong as the country's 255th recognized sport and published a single, unified competition standard. The result was Mahjong Competition Rules — often called Chinese Official or Guóbiāo (国标).

MCR catalogs exactly eighty-one named scoring patterns, organized into nine series (honor-based, chow-based, pung-based, seven pairs, suit-based, terminal-based, knitted tiles, types of waits, and special hands). A winning hand must score a minimum of eight points, not counting flowers. The Non-Repeat, Non-Separation, and Non-Identical principles govern how multiple patterns combine in a single hand.

MCR is the tournament standard. It is used at the World Mahjong Championship (held every two years since 2007), the Open European Mahjong Championship, and most major international events. Serious MCR players memorize the entire eighty-one-pattern table and can score a hand instantly upon completion.

Best for: Players drawn to chess-like precision, pattern recognition, and competitive depth. The most analytically demanding of the Chinese forms.

Tile set: Standard 144-tile set with flowers; tournament-grade tiles are typically uniform melamine for fair shuffling.

Mahjong arrived in Japan in 1924 — taught at a Tokyo school founded by a former soldier named Saburo Hirayama — and within fifty years had been transformed into one of the most sophisticated tile games in the world.

Riichi is mahjong as a thinking game. It strips out the flowers and seasons (Japanese sets contain just 136 tiles) and replaces the relatively loose scoring of Chinese variants with a strict, layered system that rewards precision.

The signature mechanic is the riichi declaration itself. When a player reaches tenpai — one tile away from a winning hand — they may, if their hand is fully concealed, declare riichi by placing a 1,000-point stick into the center of the table and turning their final discarded tile sideways. The hand is now locked. The player cannot change their tiles or strategy, but in exchange they gain a guaranteed scoring pattern (yaku), the chance for ippatsu (an immediate-win bonus), and access to ura-dora (hidden bonus tiles revealed only upon winning).

Three other features make Riichi unmistakable:

Japan's professional infrastructure around mahjong is the most developed in the world. The Japan Professional Mahjong League (JPML) was founded in 1981 by Takeo Kojima. The M.League — a team-sport professional mahjong league sponsored by CyberAgent, TV Asahi, Sega Sammy, Dentsu, and others — launched in 2018 and now runs ten teams with multi-million-yen prize pools. Japanese mahjong is broadcast on television. Japanese mahjong has anime — Akagi, Saki, Tetsuya — that have inspired a generation of Western players to learn the game.

That generation has, in large part, learned online. Mahjong Soul (雀魂), launched in 2018, is the gateway: anime-styled, free to play, with built-in tutorials that walk you through Riichi by playing it. Riichi City, Tenhou, and other clients serve more advanced communities.

Best for: Strategic, analytical players. Anyone who has fallen in love with the game through anime or online play. Anyone who likes their games refined, codified, and bottomless.

Tile set: 136 tiles, no flowers. Red dora are standard in most modern Japanese-style sets. Automatic shuffling tables (AMOS, MATSUOKA, AOTOMO) are common in serious Japanese homes and universal in commercial parlors. Riichi point sticks — physical batons used to track score — are part of the kit.

A faster, more aggressive variant played with three players and a reduced tile set (the Characters 2 through 8 are removed). Sanma is hugely popular in Hokkaido and some online clients. Hands score higher; games end faster; the strategic flavor is sharper. Most Riichi sets can be used for sanma; no special equipment is needed.

American mahjong is, in the most literal sense, its own game. It shares the tiles and the bones of the Chinese tradition, but the experience of playing it — the card, the Charleston, the jokers — belongs to nothing else on earth.

Founded in 1937 by Dorothy Meyerson and Viola Cecil at the Essex House hotel on Central Park South, the National Mah Jongg League is now the largest single mahjong organization in the world, with more than 350,000 members. Its rules differ from every other tradition in three essential ways.

The Card. Every spring, the League publishes a small folded card listing every winning hand legal for the coming year. The 2026 card lists seventy-two hands across nine sections. To win, you must build your hand to exactly match one of those printed patterns. Players carry the new card in their wallets the day it arrives; the previous year's hands become unplayable on April 1st.

The Charleston. Before the first turn of every hand, players ritually exchange tiles in a fixed sequence: three tiles right, three across, three left, then three left, three across, three right. The mnemonic is R.O.L.L.O.R. — Right, Across, Left, Left, Across, Right. The Charleston is unique to American mahjong. It is also, after the calling of "Mah Jongg!" itself, the most beloved ritual in the game.

The Jokers. American sets include eight joker tiles — wild tiles that can substitute for any tile in a set of three or more, but never in a pair. Jokers can be "robbed" from an opponent's exposed set by offering the natural tile in exchange. Joker management is the central skill of American play.

The full American set contains 152 tiles — the standard 144 plus 8 jokers — and uses larger tiles than Asian sets, designed for easy reading from a rack. Racks are universal in American play; the rack-with-pusher combination, which lets older players push the wall forward without lifting tiles, is an American innovation.

NMJL membership is matrilineal in many families. The League's proceeds fund philanthropy — historically Jewish refugee work in the 1940s and Israel support since 1948, today including the Alzheimer's Association, American Heart Association, and others. American Mah Jongg, more than any other tradition, is a game whose continuity is also a community's continuity.

Best for: American players, especially those entering an existing community (Tuesday afternoon clubs, retirement communities, family inheritances). Anyone who wants the most uniquely American tradition.

Tile set: 152 tiles including 8 jokers. Larger than Asian tiles. Four racks and pushers are standard. A current-year NMJL card is essential.

A variant developed by Air Force spouses at Wright-Patterson Air Force Base in Ohio, designed so military families stationed across the world could all play the same game without depending on the annually changing NMJL card. Wright-Patterson uses a fixed hand list that does not change from year to year. Simpler scoring, easier teaching. Played in military communities, some senior-living residences, and pockets of the country where the NMJL card never quite took hold.

Best for: Players who want the American structure (Charleston, jokers, exposed-tile play) without the annual card subscription.

Tile set: Standard American 152-tile set with jokers.

If most mahjong traditions ask for thirteen tiles and a winning hand of fourteen, Taiwanese mahjong is the outlier: sixteen tiles in hand, seventeen at the win. A winning hand is five sets and a pair instead of four sets and a pair.

The extra tiles change the entire pace and feel of the game. Hands take longer to build. There is more material to work with, more flexibility in shaping the final pattern, and more opportunity for spectacular tái accumulation. Scoring is additive rather than multiplicative — every feature of the hand adds a flat tái score, with no doubling. A hand worth eight tái is twice as good as one worth four.

Flowers carry unusual weight in Taiwanese play. Drawing your seat-wind flower (East player draws Spring; South player draws Summer; etc.) earns a bonus tái. Collecting all eight flowers in a single hand is an automatic eight-tái win, regardless of the rest of your tiles. Heavenly Win — a dealer winning on the starting hand before any discard — is worth twenty-four tái, the highest single score.

Taiwanese mahjong is the dominant form in Taiwan and is played widely throughout the Taiwanese diaspora in California, Vancouver, and Southeast Asia.

Best for: Players who want a richer, slower-developing game with more strategic depth in hand construction. Members of the Taiwanese diaspora reconnecting with home traditions.

Tile set: Standard 144-tile set; the extra seat tiles fit the standard pool. Racks sized for sixteen-tile hands are helpful.

Beyond the six major traditions, mahjong has been adapted across Asia into dozens of distinct regional forms. Four are worth knowing.

If you are starting from zero and choosing a path, a quick guide:

• You want the most globally played, traditional Chinese game → Hong Kong Old Style.
• You want the most strategically refined version → Japanese Riichi.
• You want to join an American community of millions → NMJL American Mah Jongg.
• You want competitive, tournament-grade play → Mahjong Competition Rules.
• You're reconnecting with Taiwanese family → Taiwanese 16-Tile.
• You're learning online and falling in love through anime → Japanese Riichi via Mahjong Soul.
• You want the most historically pure version → Chinese Classical.
• Your grandmother taught you → Whatever she taught you. That's the right answer.

The traditions on this page are living traditions. They have keepers — Cantonese aunties and Japanese pros and NMJL Card-holders and Taiwanese grandfathers — who have been doing this longer than most of us have been alive. Crossing between traditions, learning a new one, is one of the great pleasures of mahjong. But it is done best by sitting down at someone else's table and asking to be taught, rather than by deciding which rules you prefer and imposing them.

The tiles are old. The communities are older. Approach them with care.