Dama

Definition

Dama (ダマ) is a short form of damaten, referring to the strategy of waiting silently for a winning tile while in tenpai without declaring riichi. The hand remains closed and concealed, with no public announcement of the waiting condition.

Detailed Explanation

Dama represents a fundamental strategic choice in mahjong that contrasts sharply with the more aggressive riichi declaration. When a player reaches tenpai—the state of being one tile away from winning—they face a critical decision: declare riichi to lock their hand and announce their waiting condition, or remain silent and continue drawing tiles without revealing their status.

Strategic Considerations

The primary advantage of dama is concealment. By not declaring riichi, you maintain ambiguity about your hand’s composition and which tiles you’re waiting for. Opponents cannot use the riichi declaration as information to adjust their discard strategy. This unpredictability can make it harder for other players to avoid feeding you winning tiles.

Additionally, dama allows for flexibility in hand development. While riichi locks your hand structure—you cannot change the tiles you’re waiting for—dama technically permits you to pivot your wait if you draw the right tile. However, this flexibility is often theoretical, as most hands in tenpai cannot meaningfully change direction.

Risks and Drawbacks

The primary disadvantage of dama is the loss of the riichi bonus. In most mahjong rulesets, declaring riichi provides a 1,000-point bonus when you win. Additionally, riichi grants certain tactical advantages: you draw an extra tile immediately after declaring, and the riichi stick (worth 1,000 points) accumulates on the table, increasing your winning reward.

Dama also sacrifices the riichi declaration itself as a tactical tool. Many players use riichi to signal hand strength, influence tile flow, or apply psychological pressure. Without this declaration, you lose these elements of table dynamics.

When Dama Is Appropriate

Dama proves most effective in specific situations:

• Early game: When few tiles have been discarded and your hand composition is less transparent
• Low-value hands: When the riichi bonus represents a significant portion of your expected winnings
• Defensive positions: When you’re significantly behind in points and need to win without triggering defensive play
• Complex situations: When your hand’s waiting tiles are ambiguous or unusual

Usage Example

In a three-player game (sanma), a player draws a tile and realizes they’re waiting on two different tiles for a 2,000-point hand. Rather than declaring riichi and committing to one specific wait pattern, they choose dama. They continue drawing silently. On the next round, they draw a tile that improves their hand significantly, transforming their wait into a stronger pattern. Because they never declared riichi, they were able to adapt. When they finally win three turns later, they receive the full value without the riichi bonus, but they’ve maximized their hand’s potential.

Related Terms

• Damaten: The full term for which dama is an abbreviation; literally “silent tenpai”
• Riichi: The declaration that announces tenpai status and locks the hand, providing a bonus but sacrificing flexibility
• Tenpai: The state of being one tile away from winning; the prerequisite for both dama and riichi
• Menzenchin: A hand won without declaring riichi, which may be dama or a hand that wins before reaching tenpai
• Noten: The opposite state—not being in tenpai, therefore unable to employ dama strategy