In a mixing bowl, combine all the chicken marinade ingredients. Mix well until the honey is fully dissolved.
Put the chicken breasts in a sealable plastic bag or a shallow dish. Coat each piece of chicken with marinade. Allow the chicken breasts to marinate in the refrigerator for a minimum of 1 hour, or if you want even better flavor, marinate overnight.
In the meantime, prepare the Japanese BBQ sauce. In a separate mixing bowl, whisk together all the sauce ingredients until well combined. Set aside.
Preheat your grill or barbecue to medium-high heat. Take out the chicken from the marinade and remove any excess marinade.
For about 6-8 minutes, place the chicken on the grill and cook each side.
As the chicken nears the end of cooking, brush a generous amount of the Japanese BBQ sauce onto each side. Allow the sauce to caramelize and create a beautiful glaze on the chicken.
Once cooked through and nicely glazed, remove the chicken from the grill and let it rest for a few minutes. This will ensure juiciness and tenderness.
Serve the Japanese BBQ Sauce Chicken hot, garnished with sesame seeds and chopped green onions. It pairs perfectly with steamed rice and a side of fresh vegetables.