Tenpai
By Kenji Tanaka · Updated
Definition
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.
Tenpai
Tenpai (聴牌) is a hand state in mahjong where a player is exactly one tile away from completing a winning hand (agari). This is a critical hand condition that enables the declaration of riichi.
How Tenpai plays out at the table
In mahjong, tenpai represents the penultimate stage of hand development. When your hand is in tenpai, you need to draw or obtain exactly one specific tile (or sometimes multiple different tiles) to achieve a winning hand. This tile is called the “winning tile” or “agari tile.”
The concept of tenpai is fundamental to Japanese mahjong strategy. A hand in tenpai is considered “ready” and positions you to win on your next draw or when an opponent discards your winning tile. The number of different tiles that can complete your hand is called the “wait” – for example, if you can win on any of four different tile types, you have a four-sided wait.
Tenpai is a prerequisite for declaring riichi, one of the most important special declarations in Japanese mahjong. You cannot declare riichi unless your hand is in tenpai. Once you declare riichi, your hand becomes locked – you cannot change the tiles you’re waiting for, and you must continue drawing until you either win or the hand ends in an exhaustive draw.
The hand state immediately before tenpai is called iishanten (一向聴), meaning you are two tiles away from winning. Understanding the relationship between shanten levels helps players plan their strategy and know when they’re close to being able to declare riichi.
It’s worth noting that being in tenpai doesn’t guarantee a win. Your opponents may discard tiles that don’t help you, or you might draw tiles that don’t complete your hand. Additionally, if the game reaches the end of the round without anyone winning, players in tenpai receive bonus points (tenpai bonus) while players not in tenpai (noten) pay penalties.
Seeing Tenpai in play
Consider a player whose 13-tile hand contains: 2-man, 3-man, 4-man, 5-pin, 6-pin, 7-pin, 1-sou, 1-sou, 1-sou, 5-sou, 6-sou, East wind, East wind.
This hand is tenpai: three complete groups (2-3-4 man, 5-6-7 pin, the 1-sou triplet), the East wind pair, and a 5-6 sou shape waiting on 4-sou or 7-sou to finish the last sequence. Since the hand is closed, the player could declare riichi here, signaling to opponents that they are one tile from winning.
Related Terms
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.
Shanten
向聴
Shanten counts how many effective tile exchanges your hand is from tenpai. Tenpai is 0-shanten, iishanten one away, ryanshanten two. The number is the spine of efficient play: every discard either lowers it, holds it, or (badly) raises it, and strong players know their count without thinking. It also drives the push-or-fold decision, because a hand stuck at 3-shanten late in the hand is usually a hand you should be folding, not building.
Iishanten
一向聴
Iishanten is one-shanten: a single useful draw or call from tenpai. It is the pivot point of most hands, and the quality of your iishanten decides the quality of your wait. Good shapes accept many tiles and resolve into ryanmen; bad ones accept a handful and land on a kanchan. Much of riichi skill is simply choosing discards at iishanten that keep both the acceptance and the eventual wait wide.