2008 : The first edition of the EMA riichi rules was established in preparation of the First European Riichi Championship in 2008 in Hannover, Germany. The rules were based on the way riichi had been played by pretty much the same rules independently in Netherlands and Denmark for years. The rules were revised in 2012 to be closer to current Japanese riichi rules, though still with some variants retained.
2016 : In preparation of the event of the first World Riichi Championship in Paris, France, in 2014, the World Riichi Championship rules were compiled by Sylvain Malbec in collaboration with partners worldwide, notably the Japan Mahjong Professional League. After the event the WRC rules were slightly revised in 2015, and it was obvious to revise the EMA riichi rules in light of the WRC rules. The latest revision came into effect April 1, 2016.
2025 : The latest version of the 2025 EMA Riichi Rulebook. The document will be approved and take effect on January 1st 2026.
Riichi rule book - version 2025
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 Riichi Rules for Japanese Mahjong |