This rice bowl and matching underplate are modern Japanese porcelain items of the type called Hasami Ware from the 1970's or 1980's. They were hand enameled and fired by the Juzan Gama Kiln in Nagasaki and imported by The Charles Sadek Import Company in New Rochelle, New York for their Andrea by Sadek brand.
Both the bowl and underplate are decorated with the Japanese national flower, the chrysanthemum, primarily in cobalt blue. There are many other beautiful designs on both pieces in pale green and pale peach. The pale blue decoration on the outside of the rice bowl is called chattering kana style. The kana is a metal scraping tool, which is held against the hard but unfired bowl, When the bowl is turned, the kana "chatters" against the porcelain to make the marks you see in our photographs.
The mark for the Juzan Gama Kiln is on the bottom of both pieces in underglaze blue (again, photograph #3). Both the bowl and the underplate have the foil Andrea by Sadek Made in Japan label; on the bowl, it is partially covering the Juzan Gama mark.
The bowl measures 5 3/4 inches across the top, a little over 2 1/2 inches high and has a base 1/4 inch high. The dish is 7 1/2 inches across and 1 1/4 inches high, with a 4 1/2 inch base. Both of these lovely Japanese porcelain pieces are in outstanding condition, ready to display in any setting for a touch of Asian beauty.