Combine the soy sauce, orange marmalade, lemon juice, ginger and black pepper in a sealable plastic bag. Mix well.
Place chicken into the plastic bag, seal and allow to marinate for a minimum of 1 hour in the refrigerator.
Preheat the grill on high.
Place chicken onto the grill to cook for 3 minutes, covered. Baste the chicken with half of the marinade.
Monitor the chicken for slight charring / grill lines and when those are visible, turn chicken over and cook on high, covered for an additional 3 minutes. Baste with remaining marinade.
Reduce grill heat to low and cook for 3 minutes, covered.
Turn chicken over and cook covered for an additional 3 minutes on low.
While chicken is cooking.
Be sure to slice through the chicken to check for doneness. Chicken will be sufficiently cooked when internal temperature reads 165°F with a thermometer.
Notes
Instead of grilling the chicken breasts, you can also broil them, 10 - 15 minutes each side.