Separate the ribs, depending on how big your crockpot is. In aa measuring cup, combine soy sauce, vinegar, water, ginger, garlic, and black pepper.
Place the ribs into the crockpot. Pour the sauce over it.
Add the bay leaves.
Cover tightly. Set the crockpot into high. Cook for 4 hours.
After 4 hours, open to add the potatoes. Scoop some of the sauce to pour over the potatoes. Cover it back up and continue to cook until potatoes are fork-tender.