Word数億年すうおくねんListenYour browser has no Japanese voice, so Listen is not available.How to add a Japanese voiceCommonMeaningsNounseveral hundred million yearsKanji in this word数億年Dictionary data: JMdict and KANJIDIC2, property of the EDRDG, used under its licence (CC BY-SA 4.0).(opens in a new tab)