All natural. Since 1649. www.marukan-usa.com. Japanese chefs always refer to the importance of using the peel of the yuzu or the juice of sudachi. Marukan Ponzu is a delightful blend of natural sudachi juice imported from Japan. The elegant tartness is the perfect compliment to grilled fish; or used in salad dressings, the fragrant sudachi will add to the freshness of your salad. Marukan. Founded more than three centuries ago by Suya Kanzaburo and recognized as the mark of quality, natural-brewed vinegar. A character from his name is seen on all of our products as the Marukan trademark, a guarantee of our traditional skill and the finest quality. Product of USA.