This is an antique Japanese military sake cup, decorated with a horse, a flag, and some cherry blossoms. The words are "13th Transport" and the soldier's name Nishifuku. 

Condition: Excellent - there's an underglaze crackling on the back but it doesn't show on the front, so I think it's just a bit of stress on the glaze when the item was fired.

Size: 3.75" across