放射性降下物 ほうしゃせいこうかぶつ Meanings Noun radioactive fallout Kanji 放 release. Read as ホウ. 射 shoot. Read as シャ. 性 nature. Read as セイ. 降 descend. Read as コウ. 下 down 物 thing. Read as ブツ. Jinuma: Japanese Dictionary · Word lists