What is Four concealed triplets (スーアンコー)?
Four triplets completed without calling — a yakuman.
Han and calls
Yakuman
How it is formed
- Complete four triplets yourself; closed kans count.
- The hand must be closed.
- Winning the last triplet on a discard makes it open, so it does not count — except on a single wait.
Example hand
Winning with this shape gives the following.
- Yaku scored：Four concealed triplets
- Fu：25 fu／Yakuman
- Points for this example：32,000 points（Tsumo）
This opens the practice board with the hand already set up; press Tsumo to win with it.
Yaku it combines with
Questions
How many han is Four concealed triplets?
It is a yakuman (Yakuman on this site).
Does Four concealed triplets count on an open hand?
No. It only counts on a closed hand.
Does a shanpon ron count as four concealed triplets?
No — that triplet counts as open, so you get three concealed triplets and all triplets instead.
Now put it to work
Last updated 2026-09-14 · Run by Qdan, Inc.