Established on August 18, 1941 almost simultaneously with Naval Technology Merit Badge https://asiamedals.info/threads/naval-technology-merit-badge.23345/
Official name of the badge
陸軍技術有功章 - Army Technology Merit Badge.
Awarded by ministry of the army for different innovations in warfare...
armytechnologymeritbadge
imperial army of japan
imperial army of japan badge
imperial japanese army award badge
imperial japanese armybadge
imperial japanese armytechnologymeritbadge
japanese armybadge
陸軍技術徽章
陸軍技術有功章
陸軍技術有功章賞状