Prepare the Marinade: In a mixing bowl, combine the soy sauce, sesame oil, rice vinegar, honey, gochujang, minced garlic, and ginger. Whisk together until smooth and well combined.
Marinate the Chicken: Place the chicken thighs in the marinade and toss to coat evenly. Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to 1 hour to allow the flavors to develop. For best results, marinate overnight.
Preheat the Air Fryer: Preheat your air fryer to 380°F (193°C) for about 5 minutes.
Cook the Chicken: Lightly grease the air fryer basket with cooking spray or oil. Place the marinated chicken thighs in the basket, ensuring they are not overcrowded. Air fry at 380°F (193°C) for 18-20 minutes, flipping halfway through the cooking time, until the chicken reaches an internal temperature of 165°F (74°C) and is golden brown and crispy.
Garnish and Serve: Remove the chicken from the air fryer and let it rest for a few minutes. Garnish with chopped green onions and sesame seeds. Serve with steamed rice, vegetables, or kimchi.