In a small bowl, combine the salt, paprika, onion powder, garlic powder, ground ginger, and black pepper.
Remove the silver skin from the back of two racks of pork back ribs and season the ribs front and back with the seasoning mix.
Place a trivet in the inner cooking pot of an electric pressure cooker and add 1 cup water. Add the ribs.
Close and lock the lid, making sure the steam knob is on Sealing/Locked. Pressure cook on high for 18 minutes. If you prefer the ribs less fall-off-the-bone and with a little tug on them, cook them for only 15 minutes. If you want them to completely fall-off-the-bone, cook for 20 minutes.
Meanwhile, in a small pot on medium heat, heat 1 tablespoon vegetable or canola oil. Add onion. Sauté for 2-3 minutes until softened. Add garlic and cook for another 30 seconds, until fragrant.
Whisk in hoisin sauce, ketchup, honey, Japanese rice vinegar, rice wine and soy sauce. Bring to a simmer, lower heat and cook for 5-10 minutes. Set aside.
Once the pressure cooking is done, quick release the pressure.
Preheat the broiler. Line a sheet pan with aluminum foil. Cut the ribs into individual segments. Lay the ribs down on the side and brush with the sauce. Broil for 3-5 minutes until the ribs are slightly browned and caramelized.
Flip the ribs over, and brush with remaining sauce. Broil for 3-5 minutes until ribs are browned and caramelized.
Alternatively, grill the whole racks of ribs on the barbecue and baste with the sauce until browned and caramelized.
Serve on a platter with any remaining sauce drizzled on top. Garnish with cilantro.