See also https://asiamedals.info/threads/1940-east-asia-games-participation-badges.24541/
Obverse
2600 = 1940
紀元二千六百年奉祝 - 2600th [anniversary of the founding of the Empire] Celebration
東亞競技大會 - East Asia Games
2600th anniversary commemorative badge
2600th anniversary of the japanese empire
celebration of empire's 2600th anniversary
east asia games official's badge
紀元2600年奉祝記念章
紀元二千六百年奉祝大会役員章
紀元二千六百年奉祝東亜競技大会関西大会大会役員章