House rules

Language
Red fives
Kuikae (changing a group)
Tan Yao
Multiple Ron
Multiple Riichi
Multiple Kan
West and South rounds
Continuation in last round
Score limit
Negative score
Pon/Chi precedence
Chankan on a closed Kan
Kan dora is revealed
Pao (the responsible one pays)
Nagashi Mangan
Double yakuman
Kazoe Yakuman (with 13+ fan)
Optional yakuman
Mangan rounding-up
Fan minimum
Honba
Open Riichi
Open Riichi yakuman on Ron
Wareme
Suufon renda
Kyuushuu kyuuhai
Other