Haitei

Haitei

Haitei (海底撈月, ハイテイ) is a 1-han yaku earned by winning on the very last tile drawn from the live wall before the dead wall is reached. The poetic name translates to “catching the moon’s reflection from the bottom of the sea,” symbolizing the rarity of winning on the final available tile.

How Haitei works

Requirements

To score haitei, you must:

1. Win by tsumo: Self-draw your winning tile (not ron)
2. Final tile of live wall: The tile must be the last drawable tile before reaching the dead wall

The last tile of the live wall is the haitei tile; if no one wins after it is drawn and its discard passes, the hand ends in an exhaustive draw (ryuukyoku). If you win on this final tile, you score haitei.

Occurrence and Timing

Haitei is unpredictable. You cannot deliberately aim for it, you simply happen to be in tenpai when the wall reaches its final tile and fortunately draw your winning tile. The drama comes from the nail-biting tension: will you draw your winning tile, or will the hand exhaust into ryuukyoku?

Since the dead wall position is visible, experienced players can count tiles and know when the final draw approaches. This creates strategic pressure: defensive players fold to avoid dealing in, while aggressive players push for tenpai hoping to catch haitei.

Interaction with Other Yaku

Haitei stacks with other yaku naturally:

• Riichi + Haitei: Common combination when a riichi hand survives to the final tile
• Menzen Tsumo + Haitei: Since haitei requires tsumo, closed hands also score menzen tsumo

Comparison to Houtei

Haitei has a counterpart yaku called houtei (last discard). The difference:

• Haitei: Winning by tsumo on the last drawable tile
• Houtei: Winning by ron on the last discard before exhaustive draw

Both represent “last chance” wins, but haitei requires self-draw while houtei requires someone else’s discard.

Strategic Considerations

Tenpai Value: When approaching the final tile, being in tenpai becomes critical. Even if you don’t win, tenpai players receive bonus payments (noten penalties from non-tenpai players) during an exhaustive draw.

Defensive Play: As the wall dwindles, players not in tenpai often fold completely to avoid dealing into a winning hand. The risk of dealing in outweighs any potential gain from pushing a weak hand.

Example: Haitei in a real hand

The game has progressed for many turns. You count discards and realize only three tiles remain in the live wall before the dead wall. You’re in tenpai waiting for 5-bamboo. The wall advances, two tiles left, then one tile left. You draw the final tile: it’s 5-bamboo! You declare tsumo and reveal your hand. Because you won on the last drawable tile, you score haitei (1 han) in addition to your other yaku and dora. All three opponents pay, with the dramatic tension of the final-tile win adding to the moment.