Ron

Ron

Ron (ロン) is a method of winning in mahjong by claiming another player’s discard to complete your winning hand. The player who discarded the tile that completed your hand must pay you the full winning amount, while the other two players pay nothing.

Detailed Explanation

Ron represents one of two primary ways to achieve victory in mahjong, the other being tsumo (self-drawn win). When you declare ron, you are announcing that the tile just discarded by another player is the final tile needed to complete your winning hand configuration.

The key distinguishing feature of ron is the payment structure. In a ron win, the discarder bears the entire cost of your victory. They must pay you the full base points of your hand, which is then multiplied according to your hand’s value (meld count, dora, and other scoring factors). This differs significantly from tsumo, where the payment is divided among all three opponents, making ron generally more profitable for the winner.

To declare ron, you must immediately claim the discard before the next player draws a tile. The declaration must be made verbally and clearly, typically by saying “ron” or “agari” (depending on regional rules). Some rulesets require you to show your complete winning hand before payment is made, while others may allow you to declare first and reveal afterward.

An important restriction applies to ron declarations: you cannot win by ron if you are in a state of furiten. Furiten is a penalty condition where you have previously discarded a tile that would have completed your winning hand, making you ineligible to claim ron for the remainder of that round. However, you may still win by tsumo even while in furiten, as the restriction applies only to claiming others’ discards.

Ron wins are typically announced with higher priority than other actions. If multiple players could potentially claim the same discard, the player closest to the discarder in turn order (proceeding clockwise) has priority. However, in most rulesets, only one player can declare ron per discard.

Usage Example

Consider this scenario: You are holding a hand with three melds already completed, and you need only a 5-bamboo tile to win. The player to your left discards a 5-bamboo. You immediately declare “Ron!” and show your winning hand. The discarder must pay you the full winning amount—perhaps 8,000 points if you have a two-meld hand, or significantly more if your hand contains multiple melds or dora tiles. The other two players pay nothing in this transaction.

Alternatively, imagine you are in furiten because you discarded a 3-character tile earlier in the round, and that same 3-character would complete your hand. If another player now discards a 3-character, you cannot declare ron, even though the tile would complete your winning configuration. You would need to wait for a self-drawn 3-character to achieve tsumo instead.

Related Terms

Tsumo — Winning by drawing a tile from the wall yourself, rather than claiming a discard. Payment is divided among all three opponents.

Agari — A general term for winning in mahjong, encompassing both ron and tsumo victories.

Furiten — A penalty condition that prevents you from declaring ron if you have previously discarded a tile that would complete your winning hand.

Naki — The act of declaring a meld (pon, chi, or kan) by claiming another player’s discard before it is fully discarded.

Meld — A set of tiles claimed from other players’ discards, including pon (three identical tiles), chi (three consecutive tiles), or kan (four identical tiles).