Japanese mahjong
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| Base Info | |
| Term | Japanese Mahjong |
|---|---|
| Synonyms | Riichi Mahjong |
| Related Articles | Mahjong |
Japanese mahjong, or riichi mahjong (Japanese: リーチ麻雀, riichi maajan or usually 麻雀, maajan for short), is a tabletop game.
Brief Introduction
Japanese mahjong is a variation of mahjong rules derived from Chinese Mahjong. In recent years, thanks to ACG works such as Saki, its international popularity has therefore increased.
Riichi mahjong got its name from one of its important rules - Riichi (Japanese: リーチ or 立直).
Main rules
Japanese mahjong does not have a fixed set of standardized rules text like Chinese mahjong. The rules vary from one game platform to another, but the core main rules are common, so Japanese mahjong fans can easily adapt to the differences in the rules of different game platforms (while there are completely different rules between Chinese local mahjong and the official national standard set).
The number of players in a game of Japanese mahjong is usually 3 or 4. At the beginning of the game, all players are given 13 tiles (14 for the dealer). They needed to draw tiles or call for tiles to construct a winning hand with at least 1 yaku, and win points calculated by han and fu. When the game ends, players calculate their rankings or total points to decide who's the winner, who's the second place, etc.
The main rules of Japanese mahjong include: 136 tiles, the usual 14-tile draw pattern, the one-two draw, the tachi-no-wa, the jin-wa, the Japanese mahjong counting method (han - fu), and the 37 common types of yakuman.
In order to increase competitiveness and minimize the element of luck, most professional tournament rules in Japan do not recognize multiple Eiwa. They also do not count double Yakuman and compound Yakuman.
The highest number of folds is 13, which gives the opponent who is behind in the score a chance to catch up.
Professional tournaments will remove some of the common rules that affect fairness, depending on the situation.
List of Yaku
| Number/Type | General Yaku | Drawn Yaku | Called Yaku |
|---|---|---|---|
| Yakuman | All Green All Honors Big Three Dragons 四喜和 (Four Winds) All Simples 四杠子 |
四暗刻 (四暗刻单骑) 九莲宝灯（纯正九莲宝灯） 国士无双（国士无双十三面听） 天和 Blessing of Earth | |
| 6 Han | Full Flush | ||
| 3 Han | Half Flush All kinds of tiles |
二杯口 | |
| 2 Han | 三色同刻 三暗刻 三杠子 Little Three Dragons 混老头 对对和 |
一气通贯 混全带幺九 三色同顺 |
七对子 双立直 |
| 1 Han | 断幺九 役牌 抢杠 Over the River Under the Sea Under the River (Dora) |
Riichi Ippatsu 门前清自摸和 Harmony 一杯口 |
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