This is an antique Japanese military sake cup, decorated with a kiri, and the words "Congratulations on Victorious Return". The words on the back are "European War Participation Commemoration" and Asakura Township Shobukai". This would be in reference to a small number of Japanese troops who were sent to Europe (probably part of the navy) to help in WW1.

Condition: Excellent - some surface wear 

Size: 3.25" across