Riichi Mahjong Yaku
Nine Gates
Also known as: Chuuren Poutou · Churen Poto · 九蓮宝燈
A closed, single-suit hand based on 1112345678999 plus one extra tile of that suit.
Yaku value
Closed hand
Yakuman
Open hand
Closed only
Requirements
Hold three 1s, three 9s, one each of 2 through 8, and one additional tile, all in the same numbered suit.
Common scoring mistake
The hand must remain closed and cannot contain honors. Some rules award a double Yakuman for the pure nine-sided wait.
Values follow common modern Riichi rules. Local and tournament rules may differ, especially for double Yakuman.