ゲンジボタル LinksSentence search for ゲンジボタルSentence search for 源氏蛍Sentence search for げんじぼたるEdit in JMdict Noun1. Genji firefly (Nipponoluciola cruciata)Usually written using kana aloneOther forms源氏蛍 【げんじぼたる】 Discussions Log in to talk about this word.