ポンポン蒸気 ポンポンじょうき Also written ぽんぽんじょうき, ぽんぽん蒸気 Meanings Noun pop-pop boat (i.e.: toy boat with simple steam impeller) steam passenger launch (orig. meaning) Kanji 蒸 steam. Read as ジョウ. 気 spirit. Read as キ. Jinuma: Japanese Dictionary · Word lists