Soak ribs in cold water for 15 minutes
Rinse, drain and pat dry
Peel asian pear and add to blender with onion, garlic and water. Blend until smooth
Pour contents into bowl and add light soy sauce, dark soy sauce, mirin, sesame oil, salt, pepper and brown sugar
Whisk everything together and pour over ribs
Coat ribs with marinade and place in refrigerator
Marinade for at least 6 hours, but over night is best
Remove ribs from marinade and place on wire rack to remove excess marinade
Grill on medium high heat 6-8 minutes on each side or until fully cooked