Riichi declarations, dora indicators, furiten checks and fu counting all follow standard Riichi rules. Pick the rule preset you are used to and sit down against AI or friends.
Riichi and ippatsu, dora and ura-dora, furiten and yakuman are all handled as in real play.
Well-known Riichi rule sets are available so you can play in a familiar configuration.
Yaku and fu are worked out automatically, so you do not need to score by hand.
Riichi (Japanese) mahjong has an active tournament scene across Europe. The European Mahjong Association (EMA) runs a Riichi ranking, the European Riichi Mahjong Championship (ERMC) and dozens of club tournaments in France, the Netherlands, Germany, Italy, Austria, Denmark, Spain and the UK. Between club nights, most players practise online, and that is what this game is for: a full Riichi table in the browser, on desktop or phone, with no install and no payment.
This is an independent implementation of the publicly documented rules. It is not affiliated with the EMA, the World Riichi Championship or any online platform, and it does not use their names in the game beyond describing which public rulebook a preset follows.
If you play in EMA or World Riichi Championship events, choose the WRC Rules 2025 preset before the game starts. It plays a full hanchan (East and South rounds) with 30,000 starting points, uma of 15/5/−5/−15, no red fives, kiriage mangan, double-wind pairs worth 2 fu, 13 han or more counted as yonbaiman rather than a true yakuman, no busting (tobi) and no abortive draws, and riichi with no points condition. Concealed kan after riichi is allowed only when it leaves the hand structure unchanged.
The EMA Riichi rules share most of these choices with the WRC rulebook, so the preset is the closest practice setting for European tournament play. Casual online presets with red fives, busting and the usual platform conventions are also available if that is what your club uses on weeknights.
A free step-by-step tutorial covers hand shapes, the common yaku, when to declare riichi, dora and ura-dora, furiten and safe-tile defence, with real tiles you tap rather than text to read. In the game itself, learning mode can highlight your waits and the tiles that are dangerous to discard.
Every win is scored for you with the yaku list, fu and han shown on screen, which is the fastest way to build the scoring intuition that tournament play expects. Furiten is checked automatically so you learn the rule from your own hands instead of from a penalty at the table.
Sign in to create or join a room, then share its invitation link: friends can join from a laptop or phone for real-time play with chat. A disconnected player can reclaim their seat within the reconnection grace period; it is not held indefinitely. AI fills empty seats, so practice does not depend on exactly four people being free.
The same engine handles Riichi, Korean, Chinese Official (MCR), Sichuan, Guangdong, American and Taiwanese mahjong, so a club that plays both EMA circuits can use one site for Riichi and MCR practice.
No. A step-by-step tutorial walks you through hand shapes, yaku, riichi, dora and defence.
Several well-known Riichi presets are offered and you choose one before the game starts. For EMA or World Riichi Championship practice, pick WRC Rules 2025.
That depends on the preset. The WRC Rules 2025 preset has no red fives, as in European tournament play; the casual online presets include them.
Yes. One player creates a room and shares the invite link; up to four people play live from any browser, and AI fills any empty seat.
When you win, the yaku, fu and final score are calculated and shown for you.
Yes. Sign in to create or join a room and share its invitation link. AI can fill empty seats, and friends on desktop, phone or tablet browsers can play at the same table.