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.
Japan Cake Stand
The Peterite 2011-2012 by StPetersYork - Issuu
Japanese Plastic Plate Stand Picture Frame Stand Vtg Display
Japan Wood Stand
HONGYUTAI 3 Pack 4.5 Inch Plate Stands for Display
Japanese Wooden Plate Stand Picture Frame Stand Vtg Display
Japanese Vintage Wood Rack Display Stand For Plate, Dish, Pictures
HONGYUTAI 3 Pack 4.5 Inch Plate Stands for Display
Porch Nook Large Vintage Japanese Decorative Platter w/ Wood
Hongyutai 3 Pack 4.5 inch Plate Stands for Display Picture Stand - 4.5 inch Vinyl Table Top Display, Metal Frame Holders Decorative Plate for Book , P