Case Size: 1/64 fl oz. Yamasa Organic Tamari Soy Sauce is a rich, gluten-free soy sauce, perfect for seasoning and marinades. Yamasa Organic Tamari Soy Sauce (64 oz) is a full-bodied, organic soy sauce that is naturally gluten-free. It’s perfect for dipping, marinating, and stir-frying, adding a rich, umami-packed flavor to dishes.