お姉さんパンツ

おねえさんパンツoneesanpantsu

noun

  1. female underwear (esp. when transitioning from diapers)
  2. "big girl" panties

Kanji in this word

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences