Daisangen (Big Three Dragons)
Yakuman. Triplets (or kans) of all three dragon tiles — white, green and red. Often grown from a shousangen tenpai by upgrading the dragon pair into the third triplet. Open-friendly: most rulesets pay full yakuman regardless of calls.
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Kokushi Musou (Thirteen Orphans)
YakumanYakuman. All thirteen unique terminal-and-honor tiles, one of which is paired. The 13-way wait shape is one of the most defensive shapes in the game, and kokushi is the only yaku that can ron an ankan in most rulesets (chankan kokushi).
Suuankou (Four Concealed Triplets)
YakumanYakuman. Four concealed triplets in a closed hand. The fourth triplet must complete by tsumo to keep all four concealed — a ron win with a shanpon wait counts the winning triplet as open and downgrades the result to san ankou + toitoi instead.
Tsuuiisou (All Honors)
YakumanYakuman. A hand composed entirely of honor tiles — winds and dragons only. Often built around a chiitoitsu shape because honors form pairs more easily than triplets. Stacks with honroutou and (sometimes) shousangen for double yakuman in stricter rulesets.