Riichi Mahjong Yaku
All Triplets
Also known as: Toitoi · Toitoihou · 対々和
Four triplets or quads and a pair, with no sequences.
Yaku value
Closed hand
2 Han
Open hand
2 Han
Requirements
Build every group as a triplet or quad. The hand may be open or closed and may use numbered or honor tiles.
Common scoring mistake
The hand cannot contain a sequence. Concealed triplets may add Three Concealed Triplets or Four Concealed Triplets when their conditions are met.
Values follow common modern Riichi rules. Local and tournament rules may differ, especially for double Yakuman.