special air raid defense corps

Army pilot badge design was obviosly borrowed for this badge. Reverse 昭和十三年度 - July 1938 防護分團 - Air Raid Defense Corps 東京市中央卸賣市場 - Tokyo City Central Wholesale Market https://zh.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E9%83%BD%E4%B8%AD%E5%A4%AE%E6%89%B9%E7%99%BC%E5%B8%82%E5%A0%B4 特設防護團...