Cut chicken thighs roughly into cubes about 1.5 inches long
In a bowl, mix soy sauce, sake, ginger, garlic, and sesame oil to form the marinade.
Pour marinade over chicken, mixing well, and put in fridge to marinate at least 30 minutes, but preferably overnight.
When ready to fry, preheat your air fryer to 390 degrees.
Meanwhile, whisk flour, potato starch, and salt.
Remove chicken from marinade and dredge in the dry ingredients.
Place chicken evenly spaced in the preheated air fryer. Spray liberally with canola oil spray.
Place in air fryer at 390 degrees F for 10-12 minutes, shaking and spraying again with oil about halfway through.