くろあめ 黒い雨 LinksSentence search for 黒い雨Sentence search for くろいあめKanji details for 黒 and 雨Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. black rain; heavily polluted, radioactive rain sometimes following an atmospheric nuclear explosion (esp. that of Hiroshima) Discussions Log in to talk about this word.