Ariake Sea
Several grades of nori are available in the United States. The most common, and least expensive, grades are imported from China, costing about six cents per sheet. At the high end, ranging up to 90 cents per sheet, are "delicate "shin-nori"" ("nori" from the first of the year's several harvests) cultivated in Ariake Sea, off the island of Kyushu in Japan.