Obverse
柔 for 柔道 - Judo
reverse
第一回武者修業記念 - 1st Samurai Drill /Musha shugyō; Warrior Training; Knight Errantry/ Commemorative
Emblem of Karafuto
柔道部 - Judo Club
Musha shugyō (武者修行) is a samurai warrior's quest or pilgrimage /or 武者修業 in a case of completing a martial art school course/...
