Chinese vs Japanese vs American Mahjong: What's the Difference?

The three main mahjong families compared — tile sets, winning rules, scoring and pace — plus which variant to learn first.

Three families, one core

All mahjong shares the same skeleton: four players, a wall of 136-152 tiles, and a hand that wins with four melds plus a pair. Everything else — how you may call, what scores, how defensive you need to be — is where the variants split.

Chinese International Standard (国标) is the official tournament rules, Riichi (立直) is the Japanese version, and American Mah Jongg (NMJL) builds hands straight from the annual card.

The tile sets

All three use the 136-tile core: characters, dots and bamboo 1-9 plus the winds and dragons. American adds 8 jokers and 8 flowers for 152, and its dragons are drawn with color-coded faces. Riichi adds three red fives that are worth bonus fan.

Flowers are scoring extras in some rules and simply set aside in others — check your house rules before counting them.

Winning rules compared

Chinese International Standard needs 8+ fan to win and has a huge pattern list. Riichi requires at least one yaku and adds furiten (you cannot ron a tile you have discarded). American is the most permissive: match one line of the yearly card exactly, no yaku required.

In Chinese and Japanese play any player can win off any discard; in American the discard must complete a card line and calling rules are stricter about which tiles may be called.

Scoring styles

Riichi has the most precise scoring: fan plus fu feed a point table with mangan, haneman and yakuman ceilings. Chinese International Standard uses a pure fan-count table with its own minimums. American scores are printed next to each card line — no arithmetic at all.

The same hand can be worth very different points across variants, so learn the scoring of the variant you actually play.

Which should a beginner pick?

American is the easiest to start — the card tells you exactly what to build. Riichi is the deepest and best supported online, but furiten and yaku take time. Chinese International Standard sits in between and rewards pattern knowledge.

This site lets you try all three against AI with illustrated tutorials and in-game hints, so you can feel the difference hands-on before committing.

FAQ

Which mahjong variant is easiest to learn?
American Mah Jongg is the easiest — the yearly card tells you exactly what to build and no yaku are required. Riichi is the deepest; Chinese International Standard sits in between.
Do all mahjong variants use the same tiles?
All three use the 136-tile core. American adds 8 jokers and 8 flowers (152), and riichi adds three red fives worth bonus fan.
What is the main rule difference?
Chinese International Standard needs 8+ fan to win; riichi requires a yaku and adds furiten; American just matches a line of the yearly card.

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