I recommend buying good-quality free-range reared pork for this dish from a good butcher. This recipe is all about tenderizing the meat in advance so it literally falls off the bone.
Preheat the oven to 220°C (425°F/Gas mark 7). First prepare the poaching liquid for the ribs. Place the garlic in a mixing bowl with half the soy sauce, the dried chillies, dashi, peppercorns and shiitake mushrooms. Pour in about 1 litre (4 cups) of boiling water. Gently bring to the b