Taiwanese vs Japanese vs Cantonese Mahjong: Full Comparison

Quick comparison

This table identifies the systems; it is not a shared score sheet. Organizer, platform, and household rules can alter details in every column.

What do all three share?

All three are normally four-player draw-and-discard games using Characters, Circles, Bamboo, four Winds, and three Dragons. Chows, pungs, kongs, pairs, and calls are recognizable across the systems.

Standard hands divide tiles into melds and one pair. Structural language—shanten, effective draws, two-sided or closed blocks, and overlapping acceptance—can therefore describe all three.

What does not transfer automatically is:

1. The number of melds required.
2. Whether a completed shape is permitted to win.
3. How value and game state change the best decision.

How do hand sizes differ?

Taiwanese Mahjong

A player normally keeps 16 and draws to 17. A standard win needs five melds and one pair. The extra meld allows more blocks and pairs, while creating more excess candidates and overlapping draws.

Japanese and Cantonese Mahjong

Both normally keep 13 and complete a 14-tile hand of four melds and a pair. Their local structure matches, but Riichi yaku and furiten or Cantonese fan and liability can produce different decisions from the same shape.

How do tiles and flowers differ?

Japanese Mahjong centers on 136 basic tiles and does not use traditional Flowers and Seasons. Many rules replace ordinary fives with red fives that act as dora.

Taiwanese Mahjong commonly uses the full 144-tile set. Eight Flowers and Seasons are exposed and replaced, and seat flowers or complete flower groups can add tai.

Cantonese Mahjong may use 136 or 144. Whether flowers are included and how they score is one of the first house-rule questions.

Why can a complete shape still be unable to win?

Japanese: it needs yaku

A complete shape needs at least one yaku such as Riichi, Fully Concealed Self-Draw, Value Honor, or All Simples. Dora adds han but is not a yaku.

Cantonese: it may need minimum fan

Some old-style games permit low-value or chicken hands. New-style, Hong Kong, or local rules may require a minimum fan. The fastest structure may therefore lack winning eligibility.

Taiwanese: check minimum tai

Tables commonly agree on a minimum tai. Concealment, self-draw, winds, dragons, flowers, and named patterns can add tai, while definitions vary by house.

Can tai, fan, yaku, han, and fu be converted?

No fixed conversion is valid.

• Tai is a Taiwanese unit of hand value, often combined with a base and an agreed amount per tai.
• Fan expresses value levels in Cantonese systems, with rules-specific lists, multipliers, and limits.
• Yaku names recognized Japanese winning conditions.
• Han measures value supplied by yaku and dora.
• Fu evaluates details of melds, the pair, waits, and winning method before combining with han for points.

Similar vocabulary does not imply identical mathematics. “One tai equals one han” is not a valid universal rule.

How does calling differ?

Calls can speed up all three systems, but their costs differ.

• Japanese: an open hand cannot riichi and loses closed-only yaku. A fast open shape may have no yaku.
• Taiwanese: a call can lose concealed-hand tai and reveal direction, but the five-meld structure may make the speed gain substantial.
• Cantonese: calls can support All Pungs or flushes, while also exposing the plan or interacting with liability.

The shared minimum check is simple: establish winning eligibility after the call, then compare speed, value, and defensive room.

How do furiten and defense differ?

Furiten is a defining Japanese rule. If any current winning tile appears in the player’s own discards, the player cannot ron, although self-draw remains possible. This lets genbutsu serve as strong defense against a specific riichi player.

Taiwanese and most Cantonese games do not use the same furiten system. A tile previously discarded by an opponent is not automatically safe from that opponent later. Discards, visible tiles, and calls still carry information, but the inference is different.

How do dealer and match structure differ?

All three identify East as dealer, but dealer repeats and end conditions vary.

• Riichi commonly uses East-only or East–South matches, with repeat conditions defined by the rules.
• Taiwanese tables commonly let a winning dealer repeat and add pressure through dealer-repeat tai.
• Cantonese rounds, repeats, and payment details vary substantially.

A single hand’s nominal value is therefore incomplete. Dealer status, remaining hands, and placement can change attack and defense.

What should you change when transferring?

Taiwanese to Japanese

1. Change from a five-meld to a four-meld model.
2. Name a yaku before every call.
3. Learn furiten, riichi commitment, and defense after riichi.

Japanese to Taiwanese

1. Use a five-meld model; do not reuse 13-tile shanten.
2. Learn Flowers, tai, and dealer-repeat house rules.
3. Stop treating discards as proof of furiten.

Cantonese to Japanese or Taiwanese

Stop reusing the fan list. Rebuild winning eligibility and scoring through yaku and fu-han or through tai, then confirm flowers, hand length, and calling restrictions.

Which ruleset might suit you?

• Choose Taiwanese if you enjoy longer hands, flowers, and negotiated local table rules.
• Choose Riichi if you enjoy detailed regulations, defensive information, and placement play.
• Choose Cantonese or Hong Kong if you enjoy fan patterns and the culture and variety of Cantonese tables.

This is not a quality ranking. The important condition is that everyone uses the same rules and resolves disputed options before play.

Scope and limitations

This article compares common frameworks, not every region, platform, or event. Japanese details use WRC 2025 as a competition reference. Hong Kong Mahjong Association rules describe its published competition system. Taiwanese and Cantonese household rules remain especially varied. Use the current organizer document or an explicit table agreement.

Building the shared foundation with Tingpai Lab

Tingpai Lab trains the common structural layer: shanten, effective draws, pair roles, blocks, and shape preservation. To turn that foundation into rules-correct decisions, add the five-meld model, yaku, furiten, fan or tai, flowers, and game-state information as required.

Read by ruleset:

• Taiwanese Mahjong introduction
• Japanese Riichi Mahjong introduction
• Cantonese Mahjong introduction
• 13-tile vs 16-tile efficiency