Mahjiku › Questions › Is mahjong Chinese or Japanese?
Mahjong is Chinese in origin — it developed in China in the 1800s. Japan has its own hugely popular version, Riichi, but that is a 20th-century adaptation of the Chinese game.
Mahjong was created in China, in the lower Yangtze region around the mid-to-late 19th century, and spread across the country and then the world in the early 1920s. Every regional style descends from that Chinese original.
Japan adopted mahjong in the 1900s and developed Riichi (Japanese mahjong) — a distinct ruleset with its own scoring (han and fu), the riichi declaration, and no flower tiles in play. Riichi is enormously popular and dominates the online and competitive scene, which is why many people meet mahjong through its Japanese form. But the game itself is Chinese; Riichi is a Japanese branch of it.
So both answers contain a truth: mahjong is Chinese by origin, and Japanese Riichi is one of its most famous modern versions — alongside Hong Kong, Taiwanese, American and others.
Last reviewed 2026-08-23.
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