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/ ...
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