Word妹いもうと(さん)imouto(san)Meaningyounger sisterPart of speechnounPronunciationCourseJapaneseLessonFamily membersBreakdown of imouto(san)さんsanpolite name enderyounger sister妹Your younger sister is a woman who was not yet there when you were born.Usages of imouto(san)弟おとうと と 妹いもうと は 小しょう学がっ校こう に 通かよって います。otouto to imouto ha syougakkou ni kayotte imasu.(My) younger brother and younger sister go to elementary school.