Bring a large, heavy-bottomed pot of water to a full boil and add 1400 grams skinless pork belly. Cover and turn down the heat to maintain a gentle simmer. Cook the pork belly for 30 minutes.
1400 grams skinless pork belly
Remove the pork from the pot and let it cool enough to handle. Save 2-3 cups of the boiling liquid. Then drain and wash out the pot.
Cut the pork belly into cubes (about 2 ½-inches) and line them up in the clean pot. Add 40 grams fresh ginger, 20 grams garlic, 2 cups dashi, ½ cup sake, 4 tablespoons soy sauce, and 3 tablespoons dark brown sugar. Add some of the reserved boiling liquid in if needed to ensure the pork belly pieces are fully submerged.
2 cups dashi, ½ cup sake, 4 tablespoons soy sauce, 3 tablespoons dark brown sugar, 40 grams fresh ginger, 20 grams garlic
Turn the stove onto high heat and bring the mixture to a full boil. Skim off any foam that comes to the surface.
Reduce the heat to a gentle simmer and cover the pot with the lid slightly ajar. Braise the pork for 1 ½ to 2 hours. The cooking time will vary depending on your cut of meat.
When the pork belly is tender enough to pierce with a fork easily, transfer it to a storage container.
Skim off as much fat from the braising liquid as possible and then strain the liquid through a fine mesh sieve into the container with the pork belly.
When the braised pork belly has cooled to room temperature, add the peeled 6 soft boiled eggs. Cover the container and refrigerate the buta kakuni overnight.
6 soft boiled eggs
When you’re ready to serve the braised pork belly, transfer it to a pan, along with the braising liquid (it may have gelled). Reheat the pork kakuni over medium heat, flipping the cubes over periodically until it’s warmed through.
Turn the stove up to high heat and let the savory sauce boil until it thickens. Roll the simmered pork belly cubes around to glaze evenly, and then add the eggs at the end to reheat lightly.