1-First, place the chicken thighs in a bowl or large resealable plastic bag to get ready for marinating.

2-Next, mix the soy sauce, brown sugar, pineapple juice, garlic, and ginger until the sugar dissolves completely, creating a rich marinade.

3-Then, pour the marinade over the chicken, seal it up, and refrigerate for at least 4 hours or overnight to let the flavors soak in deeply. This step is crucial for authentic Hawaiian Style Teriyaki Chicken taste.

4-After marinating, remove the chicken from the marinade but save the liquid for later use.

5-In a medium saucepan, simmer the marinade for 5-10 minutes until it thickens slightly, turning it into a glossy sauce.

6-Preheat your grill, place the chicken on it, and brush on the cooked marinade while grilling for added flavor; cook for about 5-6 minutes per side until the internal temperature hits 165°F.

7-Once done, wrap the chicken in foil and let it rest for 5-10 minutes to keep it juicy.

8-Finally, serve the chicken whole or sliced, with extra hot teriyaki sauce on top for a finishing touch.