What is Pure straight (イッツー)?
1-2-3, 4-5-6 and 7-8-9 all in one suit — 2 han closed, 1 when open.
Han and calls
2 han → 1 han
How it is formed
- Build 1-2-3, 4-5-6 and 7-8-9 in the same suit.
- All three runs must be the same suit.
- It still counts when open, but only for 1 han.
Example hand
Winning with this shape gives the following.
- Yaku scored：Pure straight・Menzen tsumo
- Fu：30 fu／3 han
- Points for this example：6,000 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 Pure straight?
2 han closed, dropping to 1 han when you call.
Does Pure straight count on an open hand?
Yes. It still counts after pon, chi or kan.
Can a pure straight span two suits?
No. All three runs must be in a single suit.
Now put it to work
Last updated 2026-09-14 · Run by Qdan, Inc.