What professional mahjong taught me about decisions

I've been a certified professional with the Japan Professional Mahjong Association since 2017. People sometimes assume mahjong is gambling with extra steps. It's closer to poker played with more information and longer memories. Four players, 136 tiles, most of them hidden, and a scoring system where one hand can undo an hour of careful play.

It's also the best training I've had for making decisions at work.

Judge the decision, not the result

In mahjong you can make the right call and lose big. You push a strong hand because the numbers favor it, someone else wins with a large hand in the same turn, and you pay. Do that often enough and you learn to separate the quality of a decision from its outcome, because otherwise the game drives you crazy.

Work is the same, just slower. A well-prepared proposal still gets rejected for reasons you never see. A sloppy one sometimes gets through. If you only learn from outcomes, you learn the wrong lessons from both.

Push or fold

The core skill in riichi mahjong isn't building hands. It's knowing when to stop. When an opponent declares riichi, you have a few seconds to decide whether your hand is worth the risk of dealing into theirs. Good players fold early and without regret when the numbers say so. Beginners keep going because they've already invested in the hand.

I think about this whenever a deal or a project isn't working. The sunk cost is not a reason to continue. The question is only what this next move is worth compared with its risk.

The table tells you things

Every discard is information. Players who read the table well notice what their opponents are throwing away, what they stopped throwing away, and when their rhythm changed.

Customers do the same without meaning to. The questions they ask, the people who suddenly join a call, the topic nobody wants to talk about: all of it tells you where the real decision is being made.

Placement matters more than points

In league play, final placement matters more than raw score. Sometimes a safe second place is worth more than a risky shot at first. Knowing the goal of the whole game changes what the right move is in a single hand.

At work, the equivalent is knowing whether this quarter is about a renewal, an expansion or a relationship. The same move can be smart for one goal and reckless for another.

The hand after the bad hand

The most dangerous moment in mahjong is right after an unlucky loss. You want it back, so you push hands you should fold. Experienced players call it tilt and learn to feel it coming.

Work has the same trap: right after a lost deal or a hard call, the urge is to fix it in one move. I try to treat a bad result as a reason to slow down for one hand, not to speed up.