01 - Combine sake, orange juice, soy sauce, honey, brown sugar, ginger, cinnamon, lemon zest, and orange zest in a small saucepan. Simmer gently over medium heat, stirring until sugar dissolves. Reduce for 6 to 8 minutes until the mixture thickens and halves in volume. Remove from heat and set aside.
02 - Preheat oven to 400°F or prepare broiler on medium-high setting.
03 - Arrange salmon fillets on a parchment-lined baking tray. Lightly season with sea salt and freshly ground black pepper.
04 - Brush salmon generously with the prepared sake-citrus glaze, reserving some for basting during cooking.
05 - Bake for 10 to 12 minutes until salmon is just cooked through and flakes easily with a fork. For enhanced glaze caramelization, brush again with glaze and broil for 1 to 2 minutes.
06 - Transfer salmon to plates, drizzle remaining glaze over the top, and garnish with sliced spring onion, toasted sesame seeds, and citrus wedges.