also: ツーモー
drawing a tile from the wall
In mahjong, the act of drawing a tile from the wall during your turn. Often used in phrases like ツモる (to draw) or ツモ切り (discarding the drawn tile).
from Chinese zìmō
When it's your turn, you draw a tile from the wall.
winning with a self-drawn tile
Winning a hand by drawing the winning tile yourself, as opposed to claiming a discard (ロン). Often exclaimed as 「ツモ！」 when declaring a win.
Riichi, ippatsu, tsumo! (Declaring a win on the first draw after declaring riichi.)
If you win by self-draw with a concealed hand, you get the menzenchin tsumohō yaku worth one han.
ロン is winning on another player's discarded tile, while ツモ is winning on a tile you draw yourself.
winning off a self-drawn tile
Standard katakana spelling for this mahjong term, reflecting its Chinese origin.
Ateji kanji form; rarely used in practice. The katakana spelling is overwhelmingly preferred.
Alternate reading reflecting a more direct approximation of the Chinese pronunciation. Not commonly used in Japanese mahjong contexts.
From Chinese 自摸 (zìmō), meaning 'self-draw'. Used in Japanese mahjong terminology.