Nihoner

“Swallowtail butterfly” in Japanese

Short answer
揚羽蝶 agehachou あげはちょー

Swallowtail butterfly in Japanese is “揚羽蝶” (agehachou). Full meaning: swallowtail butterfly (esp. the citrus swallowtail butterfly, Papilio xuthus).

Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.