Suukantsu (四槓子)
Four kans declared by one player.
How Suukantsu (四槓子) works
Suukantsu (four kans) is a yakuman for declaring four kans in a single hand — one of the rarest hands in the game.
All four sets of the hand are kans, in any mix of concealed, open, and added, leaving just the pair to complete. The wait is therefore always a single-tile pair wait. Because four kan declarations consume four replacement tiles and flip up to four extra dora indicators, the hand announces itself loudly on the way in — which is part of why completed suukantsu hands are famously rare, showing up far less often than kokushi or daisangen.
- •All four sets must be kans; the final wait is always on the pair.
- •Open and concealed kans both count — the yakuman doesn't require concealment.
- •In many rulesets, four kans by different players instead aborts the round (suukaikan).
Suukantsu (四槓子) — FAQ
Does suukantsu have to be closed?
No. Unlike suuankou, the four kans can include open and added kans. If all four happen to be concealed kans, some rules also award suuankou on top for a double yakuman.
Why is suukantsu so rare?
You need all four copies of four different tiles routed to one player, plus the pair. Statistically it's among the rarest yakuman — many lifelong players never complete one.