How to Make It
In a medium cast-iron casserole or Dutch oven, working in 3 batches, brown the pork belly over moderate heat, turning once, about 6 minutes. Transfer to a plate. Repeat with the remaining meat.
Add the onion and ginger to the casserole and cook until softened, about 5 minutes. Add the pork belly, chicken stock, soy sauce and mirin and bring to a boil. Cover and simmer over low heat until the pork belly is tender, about 1 hour.
Meanwhile, in a large skillet, heat the oil. Add the shiitake and cook over high heat until lightly browned, about 5 minutes.
Add the shiitake, daikon and kimchi to the casserole and simmer over low heat until the daikon is tender, about 20 minutes longer. Ladle the meat, vegetables and broth into shallow bowls and serve.