The ultimate salad onion, this flat white variety is crunchy and juicy, and drips with sweet onion flavor. This short-day onion hails from Nagasaki, Japan, and is considered an important variety in Japanese culture and cuisine. Named for a volcano that overlooks Nagasaki, Unzen is ideal for snacking, adding to salads or topping sandwiches. The roots are small, flattened and perfectly uniform. It is a traditional variety of this famous Japanese city on the island of Kyushu.