How do you say demon in Japanese?
— 悪魔 (akuma), 鬼 (oni); 悪霊

Related synonyms for demon in Japanese
devil悪魔 (あくま, akuma); 鬼 (おに, oni); 悪鬼 (あっき, akki)
Generic synonyms for demon in Japanese
actor俳優 (はいゆう, haiyū); 役者 (やくしゃ, yakusha); 女優 (じょゆう, joyū)