Vocabulary What does 日本語 (にほんご) mean? 日本語 (にほんご) means Japanese language. Quick factsReadingにほんごPart of speechnounLevel (estimated, JLPT framework)N5 日本語にほんごN5 · estimated, JLPT frameworkCommonJapanese language1noun Japanese (language)Kanji in this word日day; sun本book; origin, root語language; words