Damaten
By Kenji Tanaka · Updated
Definition
Damaten is the full term for dama: staying silent in tenpai with a closed hand instead of declaring riichi. The hand must already contain a yaku to win, since riichi is not there to supply one; tanyao, pinfu, and yakuhai are the usual enablers.
Damaten
Damaten (ダマテン) is a strategic mahjong tactic where a player remains in tenpai, one tile away from winning, without declaring riichi. The player keeps their winning hand and wait pattern concealed from opponents while maintaining the ability to win at any moment.
Damaten, explained
Damaten represents a fundamental strategic choice in mahjong that contrasts directly with the riichi declaration. While riichi offers mechanical advantages like an extra han plus the chance at ippatsu and ura dora bonuses, it simultaneously broadcasts to all opponents that you are close to winning. Damaten sacrifices these benefits in exchange for strategic concealment and flexibility.
Strategic Advantages
The primary advantage of damaten is information control. By not declaring riichi, you prevent opponents from knowing your tenpai status or your winning tile. This makes it significantly harder for opponents to defend against your hand through betaori (defensive play). They cannot adjust their discard strategy based on the knowledge that you’re waiting, and they remain uncertain about which tiles might be dangerous.
Damaten also provides tactical flexibility. A player in damaten can choose to win immediately upon drawing their winning tile, or they can continue playing if circumstances change. This is particularly valuable when you might want to upgrade your hand to a higher-scoring combination, or when winning now would result in a smaller payout than waiting for a better situation. You maintain agency over your winning decision.
Additionally, damaten can be strategically sound when riichi would be counterproductive. In situations where you’re already winning by a significant margin, declaring riichi might invite unnecessary attention or aggressive play from desperate opponents. When your hand is already valuable but not yet winning, riichi might telegraph a weak position that opponents can exploit.
Disadvantages and Risks
The cost of damaten is the loss of riichi’s mechanical benefits. You forfeit the riichi han itself, plus the ippatsu and ura dora chances that only a declared riichi hand can earn. You also give up the 1-han value of riichi and cannot earn riichi-specific bonuses like ippatsu (winning within one go-around of declaring, before any call intervenes) or ura dora.
Furthermore, damaten requires accurate reads of the game state. If you misjudge the situation and opponents begin aggressive betaori, you may find your winning tiles being actively discarded or blocked, leaving you unable to complete your hand at all.
When to Use Damaten
Experienced players typically employ damaten in specific scenarios:
- Late-game situations where the hand is already strong and declaring riichi would invite unwanted pressure
- Hands with multiple possible waits where you want to keep options open for upgrading
- Situations where you’re significantly ahead and don’t need the additional riichi points
- Defensive positions where concealment provides more strategic value than the riichi bonus
Example: Damaten in a real hand
You hold a hand with three complete melds, a pair, and a 5-pin and 6-pin, waiting for a 4-pin or 7-pin to win. Rather than declaring riichi immediately, you play damaten. Your opponents don’t know you’re tenpai. When an opponent discards a 4-pin, you win quietly. By keeping your wait pattern hidden, you prevented opponents from recognizing the danger and discarding safely, increasing your chances of winning compared to if you had declared riichi.
Related Terms
Dama
ダマ
Dama is the quiet route: sitting in tenpai with a closed hand and declining to declare riichi. No sideways tile, no point stick, no warning. Opponents keep discarding freely, which makes your winning tile easier to catch. The price is steep, though. You give up the riichi han, ippatsu, and ura dora, so a dama win is usually far cheaper than the same hand with riichi. It earns its keep when your hand already has a yaku, when you want the freedom to reshape your wait, or when hiding your strength matters more than maximizing it.
Riichi
立直
The signature declaration of Japanese mahjong, and the yaku the game is named for. With a closed hand in tenpai you announce riichi, stake a 1,000-point stick, and lock your hand in exchange for 1 han plus access to ippatsu and ura dora. From that moment everyone at the table knows you are one tile from winning, and the whole hand changes around that fact.
Tenpai
聴牌
Tenpai is the ready state: one tile from a complete hand. It is the requirement for declaring riichi, and it is worth points at an exhaustive draw, when tenpai players collect from noten. The tiles that finish the hand are the wait (machi), in shapes running from the wide ryanmen to the narrow tanki. Distance from tenpai is counted in shanten, and the entire efficiency game is reaching 0 faster and wider than the rest of the table.