japanese air defense badge

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...

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...

Obverse 防空記念 - Air Defense Commemorative reverse 昭和十年度参加章 - 1935 Participation Badge 杉並區 - Suginami Ward 防護團 - Air Raid Defense Corps 第八分團 - 8th Branch

See also https://asiamedals.info/threads/1932-nami-ward-youth-league-military-training-badge.28621/ Obverse 並區 - Nami Ward 防護団 - Air Raid Defense Corps reverse 昭和七年 - 1932 軍教章 - Military Training Badge

Obverse 防空演習 - Air Defense Maneuvers 参加章 - Participation Badge reverse 昭和十一年九月 - September 1936 大阪市神路防護分團 - Osaka City Kamiji [Ward] Air Raid Defense Branch

Reverse 昭和拾二年度 - 1937 阪神防空演習参加章 - Hanshin Air Defense Maneuvers Badge 東成區防護團 - Higashinari Ward Air Raid Defense Team

Reverse 昭和十年七月 - July 1935 阪神防空演習 - Hanshin Air Defense Maneuvers 参加記念 - Participation Commemorative 天王寺第七防護分團 - Tennoji [Ward] Air Raid Defense Corps 7th Branch

Obverse 防空 - Air Defense reverse 神奈川縣防空學校 - Kanagawa Prefecture Air Defense School

Yodobashi Ward Air Raid Defense Corps badge of a similar design https://asiamedals.info/threads/1936-1937-air-defense-maneuvers-yodobashi-ward-air-raid-defense-corps-participation-commemorative-badge-_.28825/ Badge with a similar design elements...

Obverse 功 - Merit Tokyo emblem with superimposed army star. reverse 表彰 - Award 京橋区防護團 - Kyobashi Ward Air Raid Defense Corps 第一分團 - 1st Branch 昭和十四年四月 - April 1939 Original case. 表彰 - Award 京橋区防護團 - Kyobashi Ward Air Raid Defense Corps 第一分團 - 1st Branch

1st variation "badge". Obverse 御台臨 - Imperial Visit 記念 - Commemorative reverse 東久邇宮殿下 - Prince Higashikuni-no-miya 御台臨記念 - Imperial Visit Commemorative 昭和十一年九月二十日 - September 20, 1936 阪神防空演習 - Hanshin Air Defense Maneuvers 兵庫防護團 - Hyogo Air Raid Defense Corps 入江分團 - Irie Branch...

Badge with a similar design https://asiamedals.info/threads/imperial-capital-air-raid-defense-badge.23261/ 関東防空演習記念 - Kanto Air Defense Maneuvers Commemorative 下谷区防護団 - Shitaya Ward Air Raid Defense Corps 昭和八年 - 1933

Obverse 大崎分團 - Osaki (Tokyo) Branch Team reverse 昭和八.九年 - 1933-1934 防空演習 - Air Defense Maneuvers 参加記念章 - Participation Commemorative Badge

Obverse 参加章 - Participation Badge reverse 昭和拾年七月 - July 1935 三市聯合防空演習 - Three City Union Air Defense Maneuvers 品川區防護團東大崎分團 - Shinagawa Ward Air Raid Defense Corps Higashiōsaka Branch

1st Air Raid Defense Maneuvers of 1933. Reverse 中野區防護團 - Nakano Air Raid Defense Corps 昭和八年第一回演習参加記念章 - 1933 1st Maneuvers Participation Badge

Universal badge. Size 38.8 x 14.9 mm. 防空 - Air Defense Only original case allows you to get accurate attribution for these badges. 晝夜兩用 - For Day and Night 明暗二重奏 - Light and Dark Duo Stamped with 普及 - Universal 防空夜光徽章 - Air Defense Luminous Badge 實用新案願中 - New Patent Pending...