Pat the salmon fillets dry with paper towels to remove excess moisture; this helps achieve a crisp skin.
Brush a thin, even layer of teriyaki sauce onto the flesh side of each fillet, ensuring the glaze sticks well and adds flavor.
Preheat your air fryer to 400°F (200°C) for about 3 minutes, allowing it to heat evenly before cooking.
Place the salmon fillets skin-side down into the air fryer basket, ensuring they aren't touching to allow even crisping.
Set the air fryer to cook for 8 minutes, watching for the glaze to bubble and turn slightly caramelized on top.
At the 4-minute mark, open the air fryer and gently flip the salmon fillets using tongs, then brush more teriyaki sauce if desired.
Continue cooking for another 4 minutes, until the salmon skin is crispy and the glaze is bubbling and slightly caramelized.
Once cooked, carefully remove the salmon from the air fryer and transfer to a serving plate.
Sprinkle toasted sesame seeds over the top for added crunch and nutty flavor, then serve immediately.