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[[Image:Furiten.png|right|thumb|250px|[http://tenhou.net/0/?log=2012110112gm-0009-7447-14ec5c8d&tw=0&ts=4 Baiman tenpai], in furiten due to 9-sou in discard.  Ron cannot be called here.]]
[[Image:Furiten.png|right|thumb|250px|[http://tenhou.net/0/?log=2012110112gm-0009-7447-14ec5c8d&tw=0&ts=4 Baiman tenpai], in furiten due to 9-sou in discard.  Ron cannot be called here.]]
'''Furiten''' {{kana|振聴}} is a restriction applied to winning hands.  The player loses the ability to declare [[ron]] because of at least one winning tile in the discards. The hand in [[Tenpai|tenpai]] is furiten if any of that player's winning tiles are present in one's own discard pile which includes [[Naki|called tiles]], or another player's discard pile during a turn or after its own riichi.  Furiten hands are still winnable via [[tsumo|self-draw]].  A call of ron while furiten is penalized by [[chombo]], though computer games are programmed to prevent the player from declaring such a win.
'''Furiten''' {{kana|振聴}} is a restriction applied to winning hands.  While in furiten, the player loses the ability to declare [[ron|on player discards]] (ron).  However, the hand can still win by [[tsumo|self-draw]] (tsumo) given valid [[yaku]]. A hand in a [[tenpai]] state has a set of possible tile(s) for winning. Primarily, the hand is marked as furiten, if any tile in that set is in the player's own discard.  Other cases involving riichi and temporary furiten are also applicable.
 
In all cases, the furiten rule requires a player to be aware of all of their [[machi|tile waits]]. Furiten applies to all waiting tiles, even that to a [[Kokushi|thirteen sided kokushi musou]]. If a player is [[tenpai]] but does not realize all of their possible waits, then the lack of awareness may lead to an illegal win. This is especially true of a player who has called [[riichi]] and end up passing on a winning tile.
 
To enforce furiten, the [[discard pile]] is specifically arranged in front of players and [[Naki|tile calls]] are still noted as part of discard piles as turned tiles. The discard arrangements allow players to keep track of who discarded which tiles.  During a hand, players should take note of their status in relation to furiten and avoid calling winning hands while in furiten.  Likewise, any calls for winning hands should have the discards checked for furiten.  Any game involving software already checks for furiten, alerts players, and denies winning calls.


Furiten is translated as '''sacred discard''' in Chinese.  In consequence, English terminology had made this the equivalent.  However, this translation bears no relation to the Japanese term ({{kana|振り聴牌}}: thrown-away tenpai).
Furiten is translated as '''sacred discard''' in Chinese.  In consequence, English terminology had made this the equivalent.  However, this translation bears no relation to the Japanese term ({{kana|振り聴牌}}: thrown-away tenpai).


== Rule statement ==
== Rule statement ==
A hand in tenpai is in furiten in any of the following scenarios:
A hand in tenpai is in furiten in any of the following scenarios:


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