Japanese mahjong
Japanese mahjong (Japanese: 麻雀, Hepburn: Mājan), also known as riichi mahjong (リーチ麻雀, rīchi mājan), is a variant of mahjong. Japanese mahjong shares the same basic rules as other mahjong variants, but also features a unique set of rules such as riichi (a wager that one's hand will win without being altered further) and the use of dora (randomly selected tiles that will score bonus points).