Established by the Order of Minister of War No.34 on May 10, 1944.
Badge was Intended for the personnel of IJA Shipping Сommand special ships (like army special attack boats "Maru-ni", explosive boat "Shinyo", 1944 submarine-chaser "Karo-Tei" and Type 3 submergence transport vehicles)...
army shipping command
army shipping command special breast badge
imperial japan army maritime advance squadron
japanesearmy maritime advance squadron badgejapanesearmyspecialattackboatbadge
船舶用特別胸章