Shiromatsu Setouchi Flower SeaweeSalt 500g This is a moist, coarse salt type salt. The flavor from seaweed is concentrated in this salt, so it can be used in the same way as regular salt to make your dishes and pickles taste even better. Sea salt made from 100% seawater from the Seto Inland Sea is processed into seaweed salt in the Seto Inland Sea.