What is Riichi?
Riichi mahjong is the most widely played competitive ruleset in Japan and online. Players build a closed hand when possible, declare riichi on tenpai, and score with yaku plus dora bonuses.
Example ready hand
Riichi-ready sample
123 Man
456 Pin
789 Sou
Pon
Pair
Learn more
- Riichi basics — full rules overview
- Glossary: yaku
- Rankings — yaku with example hands
- Open generator