RARE HARA KIYOSHI collectible plate, title "Rainbow", Kiyoshi ceramic dish

FANTASIC piece of Pottery from "Japans national Treasure"
The piece is a lovely color and in good vintage condition. No chips damage or marks. I bought it at an esate sale and the box listed the piece as "Rainbow" assuming this it the name of the dish. The plate measures about 6 1/2 in lenght and 5 1/2 inches in width 3/ 4 inche high.
please feel free to email me if you have any questions, prior to bidding. THANK YOU!