Combine garlic, ginger, butter, 2 tablespoons of yuzu juice, and 1 tablespoon soy sauce in a bowl.
Marinate the chicken in the above mixture, turning it to coat all over. Refrigerate to marinate for 20 minutes.
Turn the oven on to 375°F.
Drain the chicken but reserve the marinade. Pat the chicken dry with paper towels.
Line a baking sheet with baking parchment. Place the chicken pieces on it and roast for 1 hour.
Baste the chicken with the reserved marinade every 15 minutes. Cover it loosely with foil if it’s browning too quickly.
Sprinkle sesame seeds over the chicken, and serve with lemon to squeeze over.