Azabu Regimental District Commissioned Officer Corps Executive Officer Badge/麻布聯隊區將校團分團役員記章

Size 50×35 mm.

Reverse

麻布聯隊區將校團 - Azabu Regimental District/Ward Commissioned Officer Corps

麻布連隊区 - Wikipedia

ja.wikipedia.org

分團役員 - Branch Executive Officer

記章 - Badge

 

Another example.