降下物 こうかぶつ Meanings Noun fallout (e.g. radioactive) Kanji 降 descend. Read as コウ. 下 down 物 thing. Read as ブツ. Words containing 降下物 放射性降下物 (ほうしゃせいこうかぶつ) radioactive fallout Jinuma: Japanese Dictionary · Word lists