Length 39.5 mm.
Width 29.6 mm.
Weight 18 g.
Reverse
関東防空大演習 - Kanto Air Defense Maneuvers
日本橋區第一分團 - Nihonbashi Ward [Air Defense Corps] 1st Branch
See also merit badge issued by the same branch https://asiamedals.info/threads/osawa-flag-store-tokyo.22329/
airdefensemaneuversbadges
imperial city airdefense association badgejapaneseairdefensemaneuversjapaneseairdefensemaneuversbadge
tokyo airdefense association badge
帝都防空協会徽章
防空大演習記念章
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
airdefense corp branch badgeairdefense corps branch membership badgeairdefense corps commemorative badge
household airdefense union membership badgejapaneseairdefensebadgejapaneseairdefensemaneuversbadge
osaka city asahi ward household airdefense union
大阪市旭區南城北家庭防空組合員之章
家庭防空組合員之章
Badge of the same design for the same Osaka Air Defense Maneuvers but from the different Corps https://asiamedals.info/threads/1937-air-defense-maneuvers-senba-air-defense-corps-participation-commemorative-badge.25019/
Obverse
防空参加記念章 - Air Defense Maneuvers Participation Commemorative...
Badge with similar design https://asiamedals.info/threads/1937-osaka-air-defense-maneuvers-commemorative-participation-badge.23920/
Obverse
Osaka City Emblem
田辺防護分團 - Tanabe Air Defense Corps
reverse
昭和十一年 - 1936
防空演習参加記念章 - Air Defense Maneuvers Participation Commemorative Badge...
Obverse
國威宣楊 - To Propagate National Prestige
第二分團 - 2nd Branch [of Air Raid Defense Corps]
reverse
日支事変之際 - On the Occasion of the China Incident
記念 - Commemorative
昭和十二年九月 - September 1937
関東防空演習 - Kanto [Region] Air Defense Maneuvers
日本橋区防護團 - Nihonbashi Ward Air Defense Corps...
1936 three city union airdefensemaneuversairdefense corp branch badgejapaneseairdefensebadgejapaneseairdefensemaneuversbadge
yotsuya ward air raid defense corps badge
三市聯合防空演習参加記念章
三市聯合防空演習四谷區防護團第一分團参加記念章
参加記念章
防空演習参加記念章
See also https://asiamedals.info/threads/1935-air-defense-maneuvers-toshima-ward-air-raid-defense-corps-nishisugamo-no-1-branch-participation-badge.25044/
Obverse
Tokyo City Emblem with superimposed Army Star
防空演習参加章 - Air Defense Maneuvers Participation Badge
reverse
豊島區防護團 - Toshima...