tsumoTwo-Sided Wait Hand (Waiting on 3 or 6 Dots)
Hand is in Tenpai waiting on 3 Dot or 6 Dot to complete the sequence.
What Is Furiten in Riichi Mahjong?
Learn what furiten means in Riichi Mahjong, how it blocks your win claims (ron), how common beginner discard errors trigger it, and key defensive tips.
What Is Furiten in Riichi Mahjong?
Learn what furiten means in Riichi Mahjong, how it blocks your win claims (ron), how common beginner discard errors trigger it, and key defensive tips.
Furiten in One Sentence: The Universal Discard Lock
Furiten is a Riichi Mahjong rule that blocks you from winning by Ron (discard claim) whenever ANY tile that could currently complete your winning hand is present in your own discard history.
Crucially, Furiten is an ALL-OUTS lock. If you hold a two-sided wait on 3 Dots and 6 Dots (4-5 in hand), and you previously discarded a 3 Dot on turn 2, you CANNOT win on an opponent’s 6 Dot discard either! Because 3 is in your river, Ron is blocked on ALL winning tiles.
Discard River Containing 3 Dot (Triggering Furiten on 3 & 6)
Because 3 Dot was discarded, Ron is blocked on BOTH 3 Dot and 6 Dot!
The Three Types of Furiten and How They Trigger
Riichi features three distinct Furiten states, each governed by different conditions:
| Furiten Type | Trigger Condition | Duration & How It Clears |
|---|---|---|
| 1. Discard Furiten (River Lock) | Any of your current winning tiles is in your own discard river. | Permanent for this wait; clears only if you change your wait shape with a new draw. |
| 2. Temporary (Same-Turn) Furiten | You passed on a legal Ron win off an opponent discard. | Temporary; clears automatically as soon as you draw a tile on your next turn. |
| 3. Post-Riichi Permanent Furiten | You declared Riichi and passed on any legal Ron win. | Permanent for the rest of the round; you can now only win by self-draw (Tsumo). |
What Furiten Does NOT Do: Tsumo Self-Draw Immunity
The most important exception to remember is that Furiten NEVER blocks a winning declaration by Tsumo (self-draw).
Even if you are in deep Discard Furiten or Post-Riichi Furiten, if you draw your winning tile yourself from the wall, you can legally declare Tsumo and collect full payments from all three opponents.
How to Prevent Furiten and Recover in Live Games
To avoid accidental Furiten: always inspect your discard river before locking in your final wait or declaring Riichi. Say all candidate winning tiles out loud.
If you find yourself in Discard Furiten with a closed hand, you have two options: 1. Keep your shape and push for a Tsumo self-draw win, or 2. Break your wait and draw a new sequence/triplet connection to establish a fresh, unblocked wait.
- Scan your river before declaring Riichi.
- Verify all winning outs (e.g. both ends of a sequence wait).
- If in Furiten, aim for a self-drawn win or change wait shape.
- Never pass on a winning Ron after declaring Riichi.
How To Practice Furiten Safety In Real Games
The best way to avoid accidental furiten is to review your discards before you lock in your wait. If you are choosing between two tenpai shapes, check whether either winning tile appears in your river. If one does, that choice puts you in discard furiten immediately. Even when the wait looks larger, a furiten hand cannot win by ron, which changes your real conversion rate.
This is especially important after declaring Riichi. Once you declare, your hand is frozen: you cannot change your wait, and passing on a winning discard triggers permanent furiten for the rest of the hand. Checking your river before declaring Riichi prevents the most frustrating fouls in the game.
Multi-Sided Waits and the Comprehensive Furiten Trap
One of the most dangerous beginner traps involves extended multi-sided sequence waits (such as 3-sided Sanmenchan shapes).
Consider a hand holding 2-3-4-5-6 in Dots, waiting on 1 Dot, 4 Dot, or 7 Dot. If you discarded a 1 Dot on turn 1, you are in Furiten for the ENTIRE wait: you cannot declare Ron on 1 Dot, 4 Dot, OR 7 Dot!
Because Furiten locks the entire hand rather than individual tiles, holding complex multi-sided waits requires diligent river scanning.
Furiten Types And Recovery Strategies
| Furiten Type | How It Starts | How To Clear It |
|---|---|---|
| Discard Furiten | A winning tile is in your discard pool | Change your wait shape with a new draw, or win by Tsumo |
| Temporary (Same-Turn) | You passed a legal Ron discard | Draw one tile on your next turn to reset the lock |
| Post-Riichi Furiten | You passed a Ron win after declaring Riichi | Cannot be cleared; you must win by Tsumo or draw |
FAQ
Can you tsumo while in furiten?
Yes! Furiten exclusively blocks Ron (discard wins). If you draw your winning tile yourself (Tsumo) and your hand has a valid yaku, you can declare the win normally.
Is furiten only a Riichi rule?
Yes, Furiten is a signature Riichi rule designed to enforce discard safety and strategic commitment. Other modes like Simplified Chinese, HKOS, MCR, Filipino, and Taiwanese do not have Furiten.
Can you tsumo while in furiten?
Yes! Furiten exclusively blocks Ron (discard wins). If you draw your winning tile yourself (Tsumo) and your hand has a valid yaku, you can declare the win normally.
Is furiten only a Riichi rule?
Yes, Furiten is a signature Riichi rule designed to enforce discard safety and strategic commitment. Other modes like Simplified Chinese, HKOS, MCR, Filipino, and Taiwanese do not have Furiten.