But while soy sauce is made from comparatively mild-tasting fermented soybeans and grains, fish sauce gets its signature flavor from something far more potent: fermented anchovies. Manufacturing methods vary among producers, but the basic process is the same: Fresh, whole anchovies are layered with sea salt and left to ferment in vats for at least 12 months.
Tamari is traditionally tied to the Japanese (vs. the more common Chinese soy sauce). It is a thicker, less salty, fermented soy sauce that contains less wheat (if not any depending on the brand, aka “gluten-free”). It can be used in asian and non-asian cooking to add a full, savory, umami flavor to your dishes.