Osaka City Asahi Ward Household Air Defense Union Membership Badge/大阪市旭區南城北家庭防空組合員之章

Badge with similar design https://asiamedals.info/threads/air-defense-corps-branch-membership-badge.25027/

Obverse

防空 - Air Defense

團員之章 - [Air Defense Corps] Branch Member Badge

reverse

大阪市旭區南城北 - Osaka City, Asahi Ward, Nanjohoku

家庭防空組合員 - Household Air Defense Union Member