Kikkoman soy sauce is the best-selling shoyu in the world. It has a complex natural brewing (fermentation) process – a special aspergillus mould is added to steamed soy beans and roasted wheat to produce a “koji” mash to which water and salt is added. This mixture called “moromi” is then left to naturally brew and develop in flavour and aroma over several months. After this time the moromi is slowly pressed and filtered to extract the raw soy sauce, then pasteurized to preserve the intense flavour and quality of the soy sauce. This is a much-simplified description, but the whole process is very involved and essential for producing Kikkoman’s unique umami-rich taste and over 300 different flavour profiles can be detected such as fruits, vanilla, coffee and whisky!