01 - In a medium mixing bowl, thoroughly whisk together the soy sauce, mirin, honey, grated ginger, minced garlic, rice vinegar, sesame oil, and black pepper until a uniform mixture is achieved. Incorporate the sliced scallions and toasted sesame seeds if they are being used.
02 - Place the chicken pieces into a large resealable bag or a shallow dish. Pour the prepared marinade over the chicken, ensuring that all surfaces of the chicken are fully coated with the marinade.
03 - Seal the bag or cover the dish tightly and refrigerate. Allow the chicken to marinate for a minimum of 1 hour, with optimal flavor development occurring between 4 to 8 hours, and up to 24 hours.
04 - Remove the chicken from the refrigerator. Lift the chicken pieces out of the marinade, permitting any excess liquid to drip off. Discard the used marinade.
05 - Cook the chicken using your preferred method: grilling, baking in an oven, or stir-frying in a skillet. Continue cooking until the chicken is thoroughly cooked through and has a caramelized exterior. Ensure the internal temperature reaches 74°C (165°F).
06 - Allow the cooked chicken to rest for 5 minutes before slicing and serving. This resting period allows the juices to redistribute, resulting in a more succulent final product.