Appears to be Japanese, pre-war probably. The makers mark is similar to marks on some damascene pieces I have. There are a couple of people here who read Japanese, perhaps they'll chime in. The color shows up as sky blue in your photos. What material is it made from? A picture of the inside might give us a clue for it's use. It's dimensions would also be helpful. Very nice though.
thanx,
capt-zero