Chinitsu (Full Flush)

A hand containing only one numbered suit plus honor tiles. 3 han closed, 2 han open. The workhorse high-value open yaku — combined with a yakuhai triplet it routinely clears mangan even after multiple calls.

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.

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.

Sequences 1-2-3, 4-5-6 and 7-8-9 all in a single suit. 2 han closed, 1 han open. The same-suit cousin to sanshoku-doujun — vertical inside one suit versus sanshoku's horizontal three-suit spread, and the two cannot coexist.

Like chanta but contains no honors — every meld and the pair contains a terminal (1 or 9). 3 han closed, 2 han open. Higher value than chanta but brittle: a single honor tile anywhere in the shape downgrades the hand to chanta.