Pat the shrimp dry. Use paper towels to remove surface moisture. Dry shrimp brown and glaze better.
Mix the teriyaki sauce. In a small bowl, whisk soy sauce, brown sugar or honey, rice vinegar, sesame oil, garlic, and ginger. Taste and adjust sweetness or salt.
If you like a thicker glaze, dissolve cornstarch in 1 teaspoon water and stir it into the sauce.
Marinate briefly. Toss shrimp with half the sauce and let sit 10 to 15 minutes at room temperature. Keep the remaining sauce for glazing after cooking.
Preheat the air fryer. Set to 400°F (200°C) for 3 minutes. Lightly spray or brush the basket with oil to help prevent sticking.
Arrange the shrimp. Place shrimp in a single layer with a little space between each piece.
Work in batches if needed so they cook evenly.
Air fry until just cooked. Cook for 4 to 6 minutes total, flipping once halfway. Shrimp are done when they’re pink, opaque, and slightly curled into a C-shape. Avoid overcooking.
Thicken the sauce (optional but great). While shrimp cook, pour the remaining sauce into a small pan.
Simmer 1 to 2 minutes until glossy and slightly thickened. If using cornstarch, it will thicken quickly.
Toss and finish. Transfer cooked shrimp to a bowl and toss with the warm sauce. Sprinkle with green onions and sesame seeds.
Add a pinch of red pepper flakes if you like heat.
Serve right away. Plate over rice, quinoa, or noodles. A squeeze of lime brightens the flavors.