Rules overview
The rules of Japanese mahjong are not completely fixed and are overly complicated. The core mechanics are the same everywhere, so any comprehensive rules description is suitable for learning the game. Specific rulesets may then differ in finer details.
Rules summary
Objective
Game setup
Hands and yaku
Scoring
Learning to play
- Youtube playlist by HanaYoriUta, a very well presented tutorial and rules reference with over 3 hours runtime
- Mahjong for Dummies, an entire website for learning the game
Specific rulesets
- Tenhou rules
- EMA Riichi Competition Rules
- USPML rules