What is Thirteen orphans (コクシムソウ)?
One of each of the 13 terminals and honours, with one of them doubled — a yakuman.
Han and calls
Yakuman
How it is formed
- Collect one each of 1 and 9 in all three suits plus all seven honours.
- Then double any one of them to reach 14 tiles.
- It is the only hand with no sets, and it must be closed.
Example hand
Winning with this shape gives the following.
- Yaku scored：Thirteen orphans
- Fu：25 fu／Yakuman
- Points for this example：48,000 points（Tsumo）
This opens the practice board with the hand already set up; press Tsumo to win with it.
Questions
How many han is Thirteen orphans?
It is a yakuman (Yakuman on this site).
Does Thirteen orphans count on an open hand?
No. It only counts on a closed hand.
Can thirteen orphans use calls?
No. It is closed only, and you cannot even declare a closed kan.
Now put it to work
Last updated 2026-09-14 · Run by Qdan, Inc.