This is an antique Japanese military commemorative dish, decorated with a shinto shrine with the stele having the words "Mitsutoku god" - a local deity, I believe. The red words underneath are "Sasebo Heavy Artillery Regiment Officer Group". I'm guessing this is for commemorating a collective worship event at this shrine, or something along those lines, for officers of the regiment.

Condition: Mint

Size: 6.25" across