Miso-Marinated Black Cod (Gindara Saikyo Yaki)

Combine white miso, mirin, sake, and sugar in a small saucepan over medium-low heat. Stir until the sugar dissolves and the mixture is smooth and slightly warmed (do not boil). Remove from heat and cool completely to room temperature. The marinade should be thick and spreadable, slightly thicker than heavy cream.

Pat the cod fillets completely dry with paper towels. Coat the flesh side generously with marinade, pressing it into the fish surface. A thin layer on the skin side is fine. Place in a zip-lock bag or container, making sure each piece is well-coated. Refrigerate for 2–3 days (72 hours for the full effect). The longer the marination, the deeper the flavor penetration and the more dramatic the miso lacquer during cooking.

Remove fillets from the marinade and gently scrape off the excess with a spoon or your fingers — do not rinse. Excess miso will burn, not caramelize. Place skin-side down on a foil-lined baking sheet lightly oiled. Broil 15–18 cm from the element for 8–12 minutes, watching constantly. The miso should caramelize to a deep golden-mahogany — not burnt, not pale.

Transfer each fillet carefully — they are extremely delicate — to a warm plate using a wide spatula. Add a small pile of sliced pickled ginger beside the fish. Grate a tiny amount of yuzu or lemon zest over the top. Serve immediately with steamed rice and a simple cucumber vinegar salad to cut the richness.