Riichi Mahjong in Singapore

Our Variant Rules

Every Japanese tournament, clubs, leagues and even parlors have their own set of rules. To make sure everybody share the same understanding of rules, we will be following the below rules.

We mainly follow the World Riichi Championship Rules with the exception of Aka-Dora. The only change in rule that we have is whether we play with aka-dora or not so please check with organiser during the first session.

World Riichi Championship Rules

You can download the rulebook here

Rule	Description	SgRiichi	Tenhou/MaSoul
Aka Dora	Red Dora	Yes	Yes
Kan Dora	New Dora revealed after a Kan	Immediate	Immediate for Ankan only
Buttobi	End of han-chan once a player goes <0	No	Yes
Shanyu	West Round	No	Yes
Tochuu Ryuukyoku	9 Terminals/Honors, 4 Players Riichi, 4 consecutive round wind discard, 4 Kans	No	Yes
Atamahane	Nearest player win in event of multiple players claiming for a win	Yes	2 winners allowed, draw for 3 winners
Nagashi Mangan	Discards of terminals/honours till exhaustive draw	No	Yes
Renhou	Win on uninterrupted 1st round of discards	5 Han	No
Agariyame	To end-chan when last dealer gets 1st after winning/tenpai on exhaustive draw	No	Yes
Kazoe Yakuman	Cumulative of 13 hans to be awarded as 32k	24k	Yes
Kiriage Mangan	4 han 30fu or 3 han 60 fu hands to be rounded up as Mangan	Yes	No
End Game Riichi Deposits	The Riichi deposits unclaimed during the end of han-chan	Confiscated	Awarded to top
Sekinin-Barai	Liability payment	Daisangen, Daisuushii, 4 Kantsu	Daisangen, Daisuushii
Chonbo Penalty	Penalty for Non-waiting Riichi, Invalid Kan	4k-all	Unable to

Keishiki Tenpai

A hand that requires a 5th copy of the tile to complete the hand is NOT considered Tenpai.