Nice powder case. Marking gin-sei( 銀 製 ), some dealers on E-bay claim that this is a mark for sterling silver, but I'm not sure about the correctness of such translation. At least I found a photo of the japanese obidome with such marking on tag.
And kanji on the front, i believe, is an artist name.
I have found from another source that 銀製 basically means "Made of Silver", which is a bit vague, but in the case of my compact, I have tested it to be sterling, or close to it (90-95% silver).