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Can I take a Joker out of someone else's exposure?

Yes. If you hold the real tile that a Joker is standing in for, you may trade it in and take that Joker, from any exposure on the table, including your own. It must be on your own turn, after you have drawn and racked or called and exposed, and you announce it out loud. A Joker sitting in somebody's concealed hand, or lying in the discards, is not available to anyone.

Answered by Prim. Last reviewed 2026-09-16.

How the exchange actually works

Somebody has a pung of five bams face up on the rack, and one of those three tiles is a Joker. You are holding a real five bam. On your turn you say what you are doing, hand your five bam to the owner of that rack, and they make the swap themselves and hand the Joker back to you.

You never touch another player's rack, and the owner never refuses. The exchange is not a favor, it is a right, and a player whose exposure contains a Joker is obliged to honor it. Announce it every time, including when you are redeeming from your own exposure, so the whole table can see what happened and when.

You may make as many exchanges in one turn as your tiles allow. If you hold two naturals that are standing as Jokers in two different exposures, take both.

The timing is the part that goes wrong

An exchange happens on your own turn, and only after your turn has properly begun, which means after you have drawn from the wall and racked the tile, or after you have called a discard and exposed the set. An exchange made before that leaves your hand one tile short, and a short hand is a dead hand.

There is a second trap right beside it. You may not redeem a Joker and then use that Joker to call the discard that was just thrown. If you want the discard, call it first. The order is fixed and it is not negotiable.

While somebody is in the middle of an exchange, nobody may call the previous discard, even if the exchanging player has not racked yet. The exchange closes that window.

What you cannot reach

A discarded Joker is dead the moment it lands. It can never be picked up, called, or traded for, by anybody, by any means. Jokers held in a concealed hand are equally out of reach, since there is nothing exposed to exchange against. And once Mahjong has been declared and verified the hand is over, so nothing on the table is redeemed after that.

Note also that only a natural goes in for a Joker, never the reverse. You cannot hand somebody a Joker and take back a real tile you want.

Two things worth knowing

A concealed hand may redeem. A Joker exchange is not an exposure and it does not break concealment, so a player quietly building a concealed line may still reach out and take a Joker from anybody's rack.

And there is the Finesse, which is the prettiest move in the game. If the very last thing you do before declaring Mahjong is a Joker exchange, from any rack including your own, the win counts as self picked and all three players pay double. A Finesse win is never jokerless, of course, since the Joker you just redeemed is sitting in the hand.