投弾 とうだん Meanings Noun, する verb dropping a bomb; bomb drop Noun slingstone See also: 投弾帯 (とうだんたい). Kanji 投 throw. Read as トウ. 弾 bullet. Read as ダン. Words containing 投弾 投弾帯 (とうだんたい) sling Jinuma: Japanese Dictionary · Word lists