Toitsu

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Toitsu 「対子」 are generic tile pairs. They may occur at any time during the development of a hand. Regardless, every hand requires at least one pair for completion, even kokushi musou.

Fu

Specific tile pairs generate fu.

Chiitoitsu

One yaku is specifically defined as a collection of pairs. Chiitoitsu is directly translated as "seven pairs".

External links