Some soy sauces are made in just a few days. Not Kikkoman. American made Kikkoman Soy Sauce is traditionally 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. That's a claim no brewed soy sauces just can't make.