Combine soy sauce, wasabi, ginger, and sesame oil ina large zip-top plastic bag; add fish. Seal and marinate at room temperature 5minutes, turning bag occasionally to coat. Remove fish from the bag, reservingmarinade. While fish marinates, heat a large non-stick pan coated with cooking spray overmedium-high heat. Add fish and marinade; cook 3 minutes. Turn fish over. Reduceheat to medium; cook 8 minutes or until fish is done.