Make the teriyaki sauce: Combine all the teriyaki sauce ingredients in a saucepan (1/4 cup (60ml) soy sauce, 1/4 cup (60ml) sake or water, 1/4 cup (60ml) brown sugar, 1 Tablespoon (15ml) rice vinegar, 1 teaspoon (5ml) corn starch, and 1/2 teaspoon (2.5ml) grated ginger). Whisk to completely combine.
Heat over medium-high heat and bring to a simmer, stirring frequently. Simmer for 1-2 minutes or until the sauce thickens. Set aside.
Add a light drizzle of the teriyaki sauce all over the salmon fillets.
Place non-stick parchment liner or silicone liner in air fryer basket or rack. Spray with oil.
Lay the sauced salmon filets on the parchment paper or silicone liner.
Air fry at 380°F (193°C) for 7 minutes. Check the salmon.
Continue to Air Fry at 380°F (193°C) for another 1-3 minutes or until salmon is cooked to your liking. The salmon should easily flake. Serve with your favorite vegetables or grain.