ふんかこう 噴火口 LinksSentence search for 噴火口Sentence search for ふんかこうSentence search for 噴火孔Kanji details for 噴, 火 and 口Edit in JMdict Noun1. (volcanic) craterOther forms噴火孔 【ふんかこう】Notes噴火孔: Irregular kanji usage. Discussions Log in to talk about this word.