Buta no kakuni ("square simmered pork belly")

 Pork cooking liquid

  • 18 oz pork belly (500g) (cut into large squares/chunks)
  • 1 tbsp vegetable oil
  • 1 spring onion
  • 5 slices ginger
  • 1 tbsp dashi soup mix
  • 2½ cups water

For the simmer sauce

  • ½ cup sake
  • ½ cup water
  • 2 tbsp dark soy sauce
  • 1 tbsp light soy sauce
  • 2 tbsp mirin
  • 2 tbsp sugar
  • 1 slice ginger

Garnish

  • 1 spring onion
  • 1 tsp toasted sesame seeds

Instructions

  1. Heat the oil in a wok or large pan and fry the pork pieces for 1-2 minutes per side to sear and char slightly. Do this in batches to avoid crowding the pan.
  2. Return all the pork to the pan and pour in all the remaining ingredients for the pork cooking liquid. Bring this to a boil, then reduce the heat to low to gently simmer.
  3. At this stage add a sheet of greaseproof paper (cut into a circle) to act as the otoshibuta (drop-lid). I used a pre-cut baking parchment circle which fit perfectly. You could also just put on a tightly fitting lid to the pan.
  4. Gently cook the pork for 1½ hours until tender.
  5. Remove the otoshibuta and then fish out the pork. Pour the cooking liquid through a sieve and set aside. Discard the ginger and spring onion.
  6. This cooking liquid can be used as a delicious broth to accompany the dish - see notes below.
  7. Return the pork to the pan and then pour in all the simmer sauce ingredients. Bring this to a boil then reduce the heat to medium/low and simmer gently for around 25 minutes until the sauce is thick and sticky. Discard the slice of ginger before serving. That's it!
  8. Serve the Kakuni alongside freshly cooked rice garnished with a little sesame seed and thinly sliced spring onions.

Notes

Make a soup with the leftover cooking liquid
The cooking broth used in the first stage is way too delicious to discard. It makes for a splendid soup to accompany the kakuni. Simply add some cooked noodles (wheat, soba or udon), a few sliced spring onions and a dash of sesame seeds or togarashi pepper and you have a joyous little soup dish!