Tenhou and chiihou

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Tenhou and chiihou
Type Yakuman
Kanji 天和
English Heavenly hand
Earthly hand
Value Yakuman
Speed Instant
Difficulty Luck

Tenhou 「天和」 is a yakuman obtained by the dealer completing the hand on the first tile draw. In other words, the hand wins before the first tile discard. Any combination of 14 tiles that can win can score tenhou. Declaring kan (or kita in sanma) will invalidate the yakuman.

Chiihou 「地和」 is similar to tenhou, except it is won by non-dealers winning on the first draw. In addition, any tile call made by other players will invalidate chiihou. By definition, both yakuman can only win by tsumo; ron is not allowed.


Tenhou and chiihou are entirely dependent on luck. The player only needs to recognize a complete hand and declare it. Failure to do so may result in a lost opportunity to score this rare yakuman.

One pitfall is to declare riichi, not recognizing that you had a winning hand.[1] This is likely due to the temptation of calling double riichi before verifying the completeness of the hand. This puts the hand into furiten immediately for calling riichi on a winning tile. Therefore, it is necessary to check the hand before making such a dubious riichi call.


Tenhou applies to dealer seats only, so therefore, it is always 48,000 points unless combined with another yakuman. Likewise, chiihou applies to non-dealers valued at 32,000 points. Both must be won via tsumo.


A related optional yaku is renhou. Assuming this yaku is used: if a player wins via ron before their first draw, and before any calls, then this yaku(man) is scored. Depending on rule variation, it may score as a mangan (or other value), not a yakuman.


A randomly drawn hand of 14 tiles has about a one in 330,000 (~0.0003%) chance of being a valid mahjong hand and thus qualifying for tenhou or chiihou.[2] Based on a Monte Carlo simulation of one hundred billion (100,000,000,000) such randomly drawn hands, the distribution of outcomes is as follows:

Outcome Occurences
Not a winning hand 99,999,696,816
Tenhou in standard form 267,813
Tenhou in chiitoitsu form 35,351
Tenhou with suuankou 43
Tenhou with kokushi musou 20
Tenhou with daisangen 1
Tenhou with chuuren poutou 1


External links

A real tenhou.
Tenhou in Japanese Wikipedia
Chiihou in Japanese Wikipedia
Tenhou scored at an RMU event.
Tenhou combined with kokushi musou in the "Battle of Asura" mode of Mahjong Soul which allows players to exchange tiles before the hand starts. In this case, the game counts kokushi musou as the 13-way wait variant, combining with tenhou for a triple yakuman—144,000 points.