is 1 , and the hand has to be closed. You declare it when the hand is one tile from winning, and you put a 1,000-point stick on the table.
The name on this site is riichi (立直). The glossary also lists it as Ready Declaration.
How you declare it
This site scores riichi by Tenhou and Mahjong Soul rules, and the 1 han matches the EMA 2016 rules. The EMA rules write the declaration as three steps. They match the glossary entry.
- Say riichi.
- Turn the sideways.
- Place a 1,000-point stick by your discards.
The hand is closed and in . A , a , or an before the declaration means you cannot declare it. At least four tiles must be left in the live wall, so you still have a draw to come. Tenhou and Mahjong Soul also require at least 1,000 points, enough to pay the stick. The EMA 2016 rules state the wall condition and set no points minimum. If an opponent wins on that sideways discard, the declaration does not count, and the 1,000 points come back.
After a valid declaration the tiles stay as they are. The EMA 2016 rules allow one exception. You may call a closed when the drawn tile matches a concealed triplet, the wait stays the same, and those three tiles can only be read as a triplet. Three consecutive triplets in the same suit do not qualify, because those tiles can also be read as three identical sequences.
The stick
The stick is a 1,000-point bet, scored apart from the han. Win the hand and the stick comes back to you. If another player wins, they take it. If the hand draws, the stick stays on the table for the next player who wins.
A closed that scores only this yaku is at least 1 han 40 fu. The base 20 plus 10 for a closed ron makes 30. A hand whose only yaku is riichi isn't , so it carries at least 2 more fu: a triplet, a pair worth fu, or a middle, edge, or . That makes 32 or more, and fu rounds up to the next 10. At 1 han 40 fu, a collects 1,300. The dealer collects 2,000. Those payments have no . Sticks on the table are added on .
Pinfu is the exception that keeps a closed ron at 30 fu. A pinfu hand also scores pinfu's 1 han, so riichi plus pinfu is 2 han 30 fu.
Ippatsu and double riichi
Ippatsu adds 1 han when you win inside one turn of the declaration, including your next draw. A chi, a pon, or a kan in that turn removes it. The EMA rules count a closed kan as a call here.
Double riichi scores 2 han for a declaration on your first discard, before anyone has called. A closed kan before that discard removes it. The 2 han is the whole value of the declaration.
A riichi win also opens the ura . The tiles under the dora indicators count for the player who declared. The glossary entry for ura dora names them.
Furiten
You may declare riichi while you are already furiten. Pass a winning discard after the declaration, and you stay until the hand ends. A still wins. The furiten guide covers all three kinds.
Price a riichi hand
The score calculator turns the han and fu into a payment, then adds each 1,000-point stick on the table.
Open the score calculator