1 han · closed only
Ippatsu
One shot. Win within one go-around of declaring riichi.
Closed1 hanOpenNot allowedHow oftenUncommon
How Ippatsu works
After you declare riichi, win before your next discard: by ron on anyone's discard in that go-around, or by tsumo on your next draw.
Example hand
Hand
Tsumo after riichi
Riichi 1 + Ippatsu 1 + Menzen Tsumo 13 han 40 fu · 5,2002,600 / 1,300
Scored by the same engine that runs the game: seat South, round East, no dora. Try your own in the hand calculator.
Good to know
- Only possible with riichi or double riichi.
- Any call by anyone (chi, pon, or kan, including a closed kan) cancels the chance.
- Pure luck. It's a bonus, not something you can plan for.
Quick answers
How many han is Ippatsu?
Ippatsu is worth 1 han and needs a closed hand.
Can Ippatsu be open?
No. Ippatsu only counts with a closed hand: no chi, pon or open kan.
How common is Ippatsu?
Uncommon. Win within one go-around of declaring riichi.