If you want a thicker teriyaki sauce, let it simmer longer or use a little more cornstarch slurry. If it’s too thick for you, stir in a little water or broth.
I prefer to serve the chicken thighs whole, but you can cut them into bite size pieces before combining them with the sauce.
If you only have bone-in and skin-on chicken thighs, you’ll want to remove the skin before marinating and cooking. You'll also need to increase the cooking time.