Vocabulary What does 四日 (よっか, yokka) mean? 四日 (よっか, yokka) means the 4th day of the month; four days. Quick factsReadingよっかRomajiyokkaLevel (estimated, JLPT framework)N5 四日よっかN5 · estimated, JLPT frameworkyokkathe 4th day of the month; four daysGenkiGenki 13Example sentences旅行(りょこう)は四日(よっか)間(かん)です。The trip lasts four days.四日(よっか)に友(とも)だちと会(あ)います。I meet my friend on the 4th.Kanji in this word四four; the number 4日day; sun