Vocabulary What does 豆乳 (とうにゅう, tounyuu) mean? 豆乳 (とうにゅう, tounyuu) means soy milk. Quick factsReadingとうにゅうRomajitounyuuPart of speechnoun 豆乳とうにゅうtounyuusoy milk1noun soy milkKanji in this word豆bean乳milk; breast