A japanese recipe of seafood or seaweed strongly flavored with Soy SaucTsukudani is usually seafood or seaweed strongly flavored with Soy Sauce. Tsukudani made from Nori (Roasted Seaweed) is one of the most popular ones. Nori Tsukudani is a black paste and may not look very appetizing for people who are not familiar with it, but it is a surprisingly tasty accompaniment for Steamed Rice.