Mahjong is not one game — it is a family of games. All major variants share the same 144-tile set and the same basic objective (complete a hand before your opponents), but the rules for winning, scoring, and special mechanics vary significantly between them.
Here is a complete guide to every major Mahjong variant.
Overview at a Glance
| Variant | Origin | Tiles | Special Mechanic | Where Popular |
|---|---|---|---|---|
| Hong Kong | China (Cantonese) | 144 | Faan scoring | East/Southeast Asia, globally |
| Japanese Riichi | Japan | 136 | Riichi declaration, Yaku requirement | Japan, international competitive |
| American | USA | ~152 | Jokers, annual NMJL card | United States |
| Taiwanese | Taiwan | 144 | 16-tile starting hand | Taiwan |
| Singaporean | Singapore/Malaysia | 144 | Variable flower scoring | Singapore, Malaysia |
| Chinese Official | China (standardised) | 144 | Point-based standardised scoring | China, international competition |
Hong Kong Mahjong (廣東麻將)
Also called: Cantonese Mahjong, HK Mahjong
Hong Kong Mahjong is the closest thing to a universal standard and the most widely played variant globally. It is the version most Chinese families play and the baseline from which most other variants developed.
Key features:
- Standard 144-tile set
- Any legal combination of four sets (pungs/chows) and one pair wins
- Scoring based on faan (番) — points for each scoring element of the hand
- All three claim types allowed: pung, chow, kong, and Mahjong
- No jokers, no annual card, no special declarations
Pace: Fast. Hands often complete in 5–15 minutes.
Why learn it: Fixed rules, broad transferability, closest to the “classic” game. Understanding HK Mahjong makes learning any other variant significantly easier.
→ Learn the full rules: How to Play Mahjong | Complete Mahjong Rules
Japanese Riichi Mahjong (麻雀 / リーチ麻雀)
Also called: Riichi Mahjong, Reach Mahjong, Japanese Mahjong
Japanese Riichi Mahjong developed from Chinese Mahjong in the early 20th century and diverged significantly. It is the dominant form in Japan and has a large, growing international competitive community.
Key features:
- 136 tiles (no flower or season bonus tiles)
- Winning hands must contain at least one yaku (scoring pattern from a fixed list) — a structurally valid hand without a yaku cannot win
- Riichi declaration: A player in tenpai (one tile from winning) can declare Riichi, placing a bet and locking their hand. Riichi itself is a yaku.
- Dora tiles: Bonus-scoring tiles revealed from the wall — each Dora in a winning hand adds points
- Furiten: A rule preventing you from winning on a discard if you previously passed on a tile that would have completed your hand
- All four players can be in tenpai simultaneously; the hand ends in a draw if the wall runs out with no winner, and tenpai players collect from non-tenpai players
- No chow claims from the player to your left (only from the player to your right, and only for specific hands)
Pace: Moderate. The yaku requirement means more hands end in draws or defensive play than in HK Mahjong.
Why learn it: The largest competitive Mahjong community outside Asia uses Riichi rules. If you want to play in tournaments or on the largest global online platforms, Riichi is the standard.
→ Full guide: Riichi Mahjong Rules
American Mahjong
American Mahjong developed through the National Mah Jongg League (NMJL), founded in 1937, and diverged dramatically from the Chinese original.
Key features:
- ~152 tiles: standard set + 8 joker tiles
- Winning hands must match an entry on the annual NMJL card, published each spring — any hand not on the card is invalid
- The card changes every year
- Jokers can substitute for any tile in a pung, kong, or quint (group of five); joker exchange is a strategic mechanic
- No chows — only pungs, kongs, quints, and pairs
- Flat scoring: each hand on the card has a fixed value
Pace: Slow to moderate. Working toward a specific target hand creates a more methodical game.
Why learn it: If your social circle plays American Mahjong, this is where you start. The community around it is warm and established, particularly in American Jewish communities.
→ Full guide: American Mahjong Rules | HK vs American Mahjong
Taiwanese Mahjong (台灣麻將)
Also called: Sixteen-tile Mahjong
Taiwanese Mahjong is distinctive primarily for its larger starting hand and its treatment of flowers.
Key features:
- Players start with 16 tiles (instead of 13) and discard down
- All 8 flower/season tiles are included and treated as ordinary tiles that must be drawn or managed
- If you draw your own-seat flower (Flower 1 for East, etc.), you can immediately declare a winning bonus
- More flowers in the mix means more replacement draws and a more chaotic early game
- Winning hands require 4 sets + 1 pair (like HK Mahjong) but starting with 16 tiles means the strategic calculus is different from the first discard
Pace: Moderate. The larger starting hand makes early decisions more complex.
Where popular: Taiwan, and Taiwanese diaspora communities.
→ Full guide: Taiwanese Mahjong Rules
Singaporean / Malaysian Mahjong
Singaporean Mahjong (also called Singapore Mahjong or Straits Mahjong) shares most rules with Hong Kong Mahjong but has a distinct approach to flowers and some additional special hands.
Key features:
- 144-tile standard set
- Flowers are important: collecting all four of one season/flower set earns significant bonus points
- “Animal tiles” are sometimes included as additional bonus tiles in Malaysian variants
- Some hands (like “13 wonders” — equivalent to Thirteen Orphans) have variant-specific rules
- Scoring is faan-based but with different point values than HK Mahjong
Where popular: Singapore, Malaysia, and regional diaspora communities.
Chinese Official Mahjong (國標麻將 / Guobiao)
Also called: MCR (Mahjong Competition Rules), Chinese Classical Mahjong
Developed in the 1990s as a standardised competitive format by the Chinese State Sports General Administration. Used in international Mahjong competitions and the World Mahjong Championship.
Key features:
- 144-tile standard set
- 81 recognised scoring elements (patterns), each with a specific point value
- No minimum hand requirement — any legal hand wins
- Highly systematic scoring: hands are evaluated against the full list of 81 elements
- No Riichi declaration, no jokers, no annual card
- Designed for competitive, rule-consistent play across different countries and cultures
Pace: Moderate to slow. The complexity of the scoring system encourages deliberate hand construction.
Where popular: International Mahjong competitions; played by serious competitive players globally.
Other Notable Variants
Korean Mahjong (화투 / Hwatu): Uses Hwatu (flower cards) rather than traditional Mahjong tiles and has a significantly different structure.
Filipino Mahjong: Closely related to Hong Kong Mahjong with some localised special hands and scoring adjustments.
Three-player Mahjong: Played across Japan, Korea, and parts of Southeast Asia with 108 tiles (one suit removed). Faster and more chaotic than four-player variants.
Which Variant Should You Learn?
For most people: Hong Kong Mahjong. It is the most transferable foundation. Once you can play HK Mahjong, picking up any other variant is a matter of learning the additions and exceptions — you already have the core.
For competitive players: Japanese Riichi. The largest global competitive scene runs on Riichi rules. If you want tournaments, online ladder play, or to engage with Mahjong as a sport, Riichi is the standard.
For American social scenes: American Mahjong. Community fit matters. If everyone around you plays American Mahjong, learn American Mahjong.
For regional heritage: play what your family plays. Mahjong is as much cultural as it is strategic. The variant your grandparents play is almost certainly the right one to learn first.
Mahjo supports Hong Kong-style Mahjong — start there and branch out from the foundation.