Shio Koji, a fermented mixture of sea salt and koji rice spore, is a traditional Japanese condiment. It is also a great umami enhancer, tenderizer, and salt substitute. It works perfectly as a marinade on fish, meat, and vegetables. Use shio koji in place of salt to get even more flavor out of your foods. Shio koji can also be used to make dressings, sauces, dips, soups, bread, cookies, and more.