Place ribs in a large pot and submerge in cold water. Rinse them gently then dump out the water and submerge in water again. Allow them to rest in the water for 30 minutes, changing the water one more time halfway through.
Mix soy sauce, water, sugar, rice wine, sesame oil, grated ginger, minced garlic and chopped green onion to a large bowl and mix.
Chop onion and pear into small chunks and place in a blender or food processor. Pulse until smooth.
Place blended onion and pear in a mesh strainer and stir to allow juices to go into the soy sauce mixture. Stir to combine.
Drain meat and add to marinade bowl. Cover and refrigerate for at least 3 hours, preferably overnight.
Take out the meat from the fridge about 20 minutes before grilling.
You can grill these ribs, or cook them over the stove. Sprinkle with some sesame seeds and extra green onion and serve!