japanese air defense badge

See also https://asiamedals.info/threads/1936-air-defense-maneuvers-toshima-ward-air-raid-defense-corps-nishisugamo-no-4-branch-participation-badge.25178/ Obverse Tokyo City Emblem with superimposed Army Star 護れ帝都 - Protecting Imperial Capital reverse 第三回 - 3rd 防空演習参加章 - Air Defense...

See also https://asiamedals.info/threads/1934-air-defense-maneuvers-shinagawa-ward-air-raid-defense-corps-kitashinagawa-branch-participation-badge.25043/ Suspension 功勞章 - Merit Badge reverse 品川區防護團 - Shinagawa Ward Air Raid Defense Corps 北品川分團 - Kitashinagawa Branch Suspension and badge...

See also https://asiamedals.info/threads/1933-kanto-large-air-defense-maneuvers-takinogawa-ward-air-defense-corps-participation-commemorative-watch-fob.27515/ ; Koishikawa Ward Air Defense Corps badges...

Obverse 第四回防空演習参加 - 4th Air Defense Maneuvers Participation 記念 - Commemorative reverse 昭和十二年七月 - July 1937 神戸區防護分團北野分團 - Kobe Ward Air Defense Corps Kitano Branch

See also https://asiamedals.info/threads/imperial-capital-air-defense-maneuvers-ushigome-ward-air-defense-corps-ichigaya-branch-participation-commemorative-badge.25032/ Obverse Tokyo City Emblem with army star reverse 昭和九年度防空演習参加記念 - 1934 Air Defense Maneuvers Participation Commemorative...

Obverse 防空 - Air Defense 監視隊 - Observarion Corps reverse 長野県 - Nagano Prefecture Case.

Obverse 防空演習記念章 - Air Defense Maneuvers Commemorative in the center 澁 for 澁谷區 - Shibuya Ward Reverse 澁谷區防護團 - Shibuya Ward Air Defense Corps 昭和八年八月 - August 1933

See also https://asiamedals.info/threads/1937-mukojima-ward-air-raid-defense-corps-2nd-terashima-branch-diligent-service-badge.29131/ ; https://asiamedals.info/threads/1935-air-defense-maneuvers-mukojima-ward-air-raid-defense-corps-participation-badge.29130/. Size 30 x 20 mm. Obverse Tokyo...

Obverse 品川區防護團大井第三分團 - Shinagawa Ward Air Defense Corps Ōi No.3 Branch 参加章 - Participation Badge reverse 昭和十一年七月 - July 1936

Badge of the same design for the same Osaka Air Defense Maneuvers but for the different Corps https://asiamedals.info/threads/1937-air-defense-maneuvers-ainichi-air-defense-corps-participation-commemorative-badge.25191/ Size 32 x 40 mm. Weight 16.3 g. Obverse 防空参加記念章 - Air Defense Maneuvers...

Obverse 功勞 - Merit 防空参加 - Air Defense Participation reverse 贈 - Gift 贈皇記二五九四年 -1934 惠美第二防護分團 - Emi 2nd Air Raid Defense Corps

Badge of similar design https://asiamedals.info/threads/1936-three-city-union-air-defense-maneuvers-participation-badge.25016/ Size 30 mm. Weight 12 g. Obverse 防空 - Air Defense reverse 昭和十一年七月 - July 1936 第五回防空演習参加章 - 5th Air Defense Maneuvers Participation Badge 業平分團 - Narihira Branch...

Obverse 杉並第十六分團 - Suginami Air Raid Defense Corps 参加章 - Participation Badge reverse 昭和十年 - 1935

Obverse 防空 - Air Defense

See also https://asiamedals.info/threads/1934-kansai-large-air-defense-maneuvers-aika-youth-league-participation-commemorative-badge.25033/ Obverse 記念 - Commemorative reverse 昭和九年七月 - July 1934 近畿防空演習 - Kansai [Region] Air Defense Maneuvers 汎愛防護分團 - Han-ai (Osaka) Air Raid Defense Corps...

Size 32 x 22 mm. Obverse 義勇奉公 - Loyalty and Courage [Serve for the Nation with Loyalty and Courage; Spirit of National Duty and Service] 第二分團 - 2nd Branch (most likely Nihonbashi Ward, Tokyo...

Badge with a similar design elements https://asiamedals.info/threads/nihonbashi-ward-air-raid-defense-corps-1936-united-air-defense-maneuvers-participation-badge.24808/ 1st variation. Obverse 忠君愛國 - Faithful Patriots (idiom) 第二分團 - 2nd Branch (most likely Nihonbashi Ward, Tokyo) reverse...

Badge with a similar design https://asiamedals.info/threads/1934-kinki-air-defense-maneuvers-kite-design-participation-sommemorative-badges.24118/ Obverse 参加章 - Participation Badge inside the emblem 集 for 集英 - Shūei reverse 昭和十二年度 - 1937 集英防護分團 - Shūei [gathering of talented...

Badge was converted into a watch fob. Reverse 昭和十二年度 - 1937 防空演習参加記念 - Air Defense Maneuvers Participation Commemorative Engraved 粉賓第二區防護組合 - 2nd Konahin Ward Air Raid Defense Union

Interesting Korea-related badge and watch fob. 1st type. Obverse 防空 - Air Defense in the center 功 - Merit reverse 京城府防護團 - Keijō Air Raid Defense Corps Keijō, or Gyeongseong, was an administrative district of Chōsen that corresponds to the present Seoul, the capital of South Korea...