Some soy sauces are made in just a few days. Not Kikkoman. American-made Kikkoman Soy Sauce is naturally brewed and aged for full flavor from water, wheat, soybeans and salt. Its complex flavor, delicate aroma and appealing reddish-brown color complement and intensify the natural flavor, aroma and color of foods without masking or overpowering. Thats a claim non-brewed soy sauces just cant make. Plastic Jug, Kosher View Nutrition Fact