See also https://asiamedals.info/threads/toshima-ward-takada-no-5-branch-of-air-raid-defense-corps-merit-badge.24945/ ; https://asiamedals.info/threads/1935-air-defense-maneuvers-toshima-ward-air-raid-defense-corps-nishisugamo-no-1-branch-participation-badge.25044/ ...
1937 toshima ward air raid defense corps badge
1937年池袋第二分團豊島區防護團有功章
badge made by takayama medals
japanese air defense badge
japanese air defense corps badge
takayama medals workshop
高山徽章商會
