This is a Japanese vintage plastic plate stand. It is black. Originally, it is a plate stand that is displayed by standing the plate, but it is also possible to stand the frame and decorate it.
VINTAGE RECORD AUCTION #51 - Nauck's Vintage Records
Porch Nook Large Vintage Japanese Decorative Platter w/ Wood
Japan Wood Stand
Vintage Asian Japanese Wood Round Frame & Stand Silk Needle Work
HONGYUTAI 3 Pack 4.5 Inch Plate Stands for Display
Japan Cake Stand
The Project Gutenberg eBook of The Whistler Book, by Sadakichi
Japanese Wooden Plate Stand Picture Frame Stand Vtg Display
Japanese Wooden Display Stand Vtg Multi-purpose Showcase Rack
Japan Cake Stand
Japanese Tables & Stands, Online Shop
ENDED* Consignment Auction - Darlington, PA
Japanese Wooden Plate Stand Vtg Picture Plate Display Saratate
Japanese Vintage Wood Rack Display Stand For Plate, Dish, Pictures