This is an antique Japanese glass dish, decorated with a cherry blossom in the center and the words "Great Japanese Empire Victory Commemoration". The phrasing used here is the same as the one named for the WW1 victory medal, and the use of the "Great Japanese Empire" suggests that this is a WW1 piece - it also works because I've only ever seen glass dishes made for around the WW1 period. The dots that form the words are actually protruding from the back of the dish. 

Condition: One short hairline along the edge, please see picture. There's other creases on the dish but that's just manufacturing imperfection.

Size: 5" across