信しん号ごう拳けん銃じゅう

noun

flare gun; signal pistol

A device that fires flares for signaling or illumination. 'Very pistol' is a specific brand name sometimes used generically.

• 遭そう難なん者しゃは信しん号ごう拳けん銃じゅうで救きゅう助じょを求もとめた。

  The castaway used a flare gun to call for help.