チャレンジャー爆発事故 チャレンジャーばくはつじこ Meanings Noun explosion of the Space Shuttle Challenger (January 28, 1986); Space Shuttle Challenger disaster Kanji 爆 explode. Read as バク. 発 emit. Read as ハツ. 事 matter 故 cause. Read as コ. Jinuma: Japanese Dictionary · Word lists