Put the pork in a pot just large enough to hold it. Add the doenjang, onion, garlic, ginger, scallions and coffee or peppercorns, and add water to cover by 1 inch.
Bring to a boil, then reduce the heat and simmer, partly covered, for 60 to 70 minutes, until a chopstick slides easily into the meat.
Meanwhile, make the radish salad: toss the daikon with a pinch of salt for 10 minutes, squeeze out the water, then mix with the gochugaru, fish sauce, allulose, garlic and scallion.
Rest the pork for 10 minutes, then slice it 1/4 inch thick.
Arrange the pork on a platter with the cabbage leaves, radish salad and salted shrimp. Wrap a slice of pork with radish salad and a tiny bit of salted shrimp in a cabbage leaf.