Obverse
賞 - award
reverse
帝国在郷軍人會 - Imperial Military Reservist Association
板橋区聯合分會 - Itabashi Ward Branch of Association
Itabashi - Wikipedia
en.wikipedia.org
Original case.
賞 - award + manufacturer label inside.
Badge was made by famous Japanese Empire Emblem workshop/日本帝国徽章商会.