Pinfu
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.
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123m456m789m234p88p
Open in shanten calculator →Related yaku
Riichi
1 HanDeclared on a closed tenpai hand by discarding sideways and betting 1000 points. Locks the hand and unlocks a chance for ippatsu and uradora.
Tanyao (All Simples)
1 HanA hand containing no terminals (1s, 9s) and no honor tiles — only 2-8 of suits. 1 han, open or closed under modern kuitan rules; strict rulesets still require menzen. The workhorse open yaku, easy to lock in whenever the early hand is heavy on middle tiles.
Iipeiko (Pure Double Sequence)
1 HanTwo 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.
Menzen Tsumo
1 HanWinning by self-draw on a fully closed hand (no calls). The default kicker on any closed tsumo win, which is why riichi + pinfu + tsumo is the canonical fast-cheap closed-attack template.
Ryanpeikou (Two Pairs of Identical Sequences)
3 HanA closed hand containing two separate pairs of identical sequences (two iipeiko shapes). 3 han, closed-only. Mathematically a chiitoitsu shape, so most rulesets do not let a hand score iipeiko twice instead — ryanpeikou simply replaces the would-be 2 han stack.