Kanji九
Readingちゅー
Frequencyless than 1%
Used in (4 in total)
all simples; winning hand containing no terminal tiles or honor tiles
nine gates; winning hand composed of 1-1-1-2-3-4-5-6-7-8-9-9-9 of the same suit plus one additional tile of the same suit
thirteen orphans; winning hand containing one of each terminal and honor tile