This is an antique Japanese military sake cup, decorated with an insignia of some cadet branch of the imperial house - using 14 instead of 16 petals chrysanthemum and charged with a cherry blossom in the center. The words on the cup's exterior are "Meiji 39th Year May 30th Army Youth Academy Graduation Commemoration". I suspect this is for a member of the imperial household - a junior cadet branch that uses this insignia. The youth academy was for the training of career army officers starting at a young age - attendees were basically in grades 7-8 or so, or early teenage years. 

Condition: Excellent - light fading of the gold

Size: 3.75" across