On August 12, 1941 the decision was made to start making Japanese Red Cross Society membership medals in aluminum and Merit Orders in silvered bronze https://asiamedals.info/threads/japan-red-cross-medal-and-merit-orders-silver-vs-aluminum.26523/.
Complete set in a typical for such order...
japanese red cross order of merit
japanese red cross ordermade in silvered bronze
war-time japanese red cross order of merit
日本赤十字社カップ
日本赤十字社有功章
日本赤十字社章
有功章