Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
It could also be related to Civil Defense Corps /Keibodan/ https://asiamedals.info/forums/keibodan-civil-defense-corps-badges.725/
Obverse
御視閲記念章 - Imperial Inspection Commemorative Badge
reverse
昭和十七年十月 -...
Judging by yellow enameled star this is Keibodan-related badge https://asiamedals.info/forums/keibodan-civil-defense-corps-badges.725/
Obverse
防空 - Air defense
監視 - Surveillance
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
功勞 - Merit
reverse
贈呈 - [Presented as a] Gift
昭和拾ー年参月 - March 1936
小石川區防護團 - Koishikawa Ward (Bunkyo, Tokyo) Air Defense Corps
This oversized badge has diameter more than 50 mm.
Comparative size...
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Suspension
参加記念章 - Participation Commemorative Badge
Nicely designed badge.
reverse
防空演習 - Air Defense Maneuvres
参加記念 - Participation Commemorative
淀橋第五分團 - Yodobashi [ward, one of the 35 former wards of...
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
防空 - Air Defense
reverse
昭和十ー年九月 - September 1936
福島県防空大演習 - Fukushima Prefecture Air Defense Large Maneuvers
参加記念章 - Participation Commemorative Badge
平町青年團 - Tairamachi (town located in Meguro-ku...
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
防 - Defense
神田 - Kanda (area in northeastern Chiyoda, Tokyo)
第三分團 - 3rd Branch
reverse
参加記念章 - Participation Commemorative Badge
昭和十年七月 - July 1930
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
表彰 - Commendation; Award
reverse
昭和十二年度阪神防空演習 - 1937 Hanshin Air Defense Maneuvers
大阪市住吉防護分團 - Osaka City Sumiyoshi Ward Air Defense Corps
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/
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
Obverse
防空 - Air Defense
報國 - Self-giving Service to Country
reverse
昭和十二年防空演習記念 - 1937 Air Defense Maneuvers Commemorative
大宝防護分團 - Taihō Air Defense Corps Branch
畳屋町隊之章 - Tatamiya Town Corps Badge
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 airdefense maneuvers
airdefense corp branch badgejapaneseairdefensebadgejapaneseairdefense maneuvers badge
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