Wash duck; place duck pieces in glass dish. Combine soy sauce, oil, sugar, ginger, onion, garlic, lemon juice and 1/2 cup water in bowl; mix well. Pour over duck. Marinate in refrigerator overnight.
Drain, reserving marinade. Cook over medium coals with grill hood closed until medium rare, turning duck and basting with reserved marinade several times. Do not overcook. May be baked at 350° F for one hour as well.
Servings: 4