Amabito No Moshio Ancient Japanese Seaweed Salt - 300 gram bag300 gram bag Japan As featured on Netflix series, SALT FAT ACID HEAT with Samin Nosrat Naturally higher in iodine, due to how the salt is made. From Alice Gordenker at the Japan Times: "There's a lot we don't know about salt making in ancient Japan, according to Hiroki Takanashi, curator at the Tobacco and Salt Museum in Tokyo, but the very earliest method was probably burning Hondawara seaweed and using the resulting ashes for their salt content.