"This is my friend Sharon's recipe and it is phenomenal! She is a great cook and I am so happy she shared it with me! For optimal presentation, garnish the servings with shiso (perilla) leaf, and serve with hot jasmine rice."
Whisk together the sugar, corn syrup, soy sauce, sake, hoisin sauce, white miso, red miso, ginger root, garlic, shallot, and 3 tablespoons canola oil in a bowl until blended. Toss the fillets with the marinade, cover, and marinate in the refrigerator 4 to 6 hours.
Preheat oven to 350 degrees F (175 degrees C).
Remove the fillets from the marinade, and scrape off the excess. Scrape the marinade into a small saucepan and set aside. Heat the remaining 2 tablespoons of canola oil in a large, heavy cast iron skillet over high heat. Brown the fillets in the hot oil for 1 minute on each side, then place into the oven, and bake until the fish flakes easily with a fork, about 10 minutes.
While the fish is in the oven, bring the remaining marinade to a simmer over medium-high heat, then reduce heat to medium-low, and simmer for 10 minutes. Serve the sea bass accompanied by the miso sauce.