Prepare the marinade: In a bowl, whisk together pineapple juice, soy sauce, brown sugar, rice vinegar, ketchup, minced garlic, grated ginger, sesame oil, and red pepper flakes until well combined.
Marinate the chicken: Place chicken thighs in a large zip-top bag or shallow dish. Pour half of the marinade over chicken, reserving the other half for basting. Marinate for at least 2 hours or overnight in refrigerator.
Prepare the grill: Preheat grill to medium heat (about 350°F). Clean and oil grates to prevent sticking.
Grill the chicken: Remove chicken from marinade and place on grill. Cook for 6-8 minutes per side, turning frequently ("huli huli" means turn turn).
Baste and finish: During the last 10 minutes of cooking, baste chicken with reserved marinade every 2-3 minutes, continuing to turn frequently to build up the glaze.
Check doneness: Cook until internal temperature reaches 165°F and glaze is caramelized and sticky.
Rest and serve: Let chicken rest for 5 minutes, then garnish with chopped green onions and serve immediately with steamed rice and grilled pineapple.Retry
Keyword grilled chicken, Hawaiian BBQ, island food, luau, Pacific cuisine, pineapple glaze, summer grilling, sweet and savory, teriyaki style, tropical,