(Kansai) first-year student; freshman

number one

spot (glimpse, outline); sighting

one game (checkers, etc.)

first instance; first trial

one pair (set) of clothes

one time / one round; one bout

(mahjong) Alternative spelling of 一萬 (“the tile of 1 wan”)

A million quintillion, 10³⁶, or a sextillion of dated British or Australian English, in modern Japanese since 17th century.

A trillion trillion, 10²⁴, or a septillion of modern English in modern Japanese since 17th century.