Tanyao (All Simples)

A closed hand of all sequences, with a non-yakuhai pair and a two-sided (ryanmen) wait. Adds zero fu beyond the base — pinfu tsumo stays at 20 fu, pinfu ron rounds to 30. The high-frequency partner of riichi and tanyao in closed-attack templates.

Declared on a closed tenpai hand by discarding sideways and betting 1000 points. Locks the hand and unlocks a chance for ippatsu and uradora.

Two identical sequences (e.g. two 234m) in the same suit, in a closed hand. 1 han, closed-only — any call kills it outright. Replaced by ryanpeikou (3 han) when the hand contains two such pairs of identical sequences.

The same numerical sequence in all three numbered suits (e.g., 234m / 234p / 234s). 2 han closed, 1 han open. Often paired with pinfu or tanyao, and structurally exclusive with ittsu — pick one or the other based on whether your early draws cluster vertically or spread horizontally.

A triplet (or kan) of any dragon, the round wind, or the player's seat wind. Each qualifying triplet scores 1 han, and a triplet that doubles as both round-and-seat wind (renpuuhai) scores 2 under most rulesets. The simplest open-friendly yaku in the game.