Buy 1 Get 1 FREE Kikkoman Soy Sauce Coupon October 5, 2010 This post may contain a link to an affiliate. See my disclosure policy for more information. Kikkoman released a new high value coupon! Go here to print a Buy One Get One FREE Kikkoman Naturally Brewed Soy Sauce (up to $3) coupon. This is a SmartSource coupon and allows 2 prints per computer. Thanks, Hip2Save!