I don't know how authentic this is, especially since it isn't smoked, but this is a recipe I came across in a cookbook I have from David Burke:
1 side salmon about 2 to 2-1/2 pounds, skin and bones removed
2 cups soy sauce
3/4 cup honey
6 Tbsp water
3 cloves garlic, minced
2 tsp freshly ground pepper
Place fish on a platter. Combine all other ingredients and spoon over fish. Cover and refrigerate. Marinate fish for 36 to 48 hours. Turn fish once in marinade. Remove salmon from marinade. Pat dry and cut into thin slices diagonally.