Vocabulary What does 東亜 (とうあ, toua) mean? 東亜 (とうあ, toua) means East Asia; the Orient. Quick factsReadingとうあRomajitouaPart of speechnoun 東亜とうあtouaEast Asia; the Orient1noun East Asia; the OrientAlso written: 東亞Kanji in this word東east亜Asia; next, second