Slice the pork loin and pork belly into thin, uniform strips.
Place the pork belly in a cold skillet and turn the heat to medium-high, rendering the fat until the pieces are golden.
Add the pork loin to the skillet and sear until cooked through and slightly browned.
Stir in the chopped kimchi and sauté for 2 minutes until the juices begin to caramelize.
Add the cooked brown rice to the pan, pressing it down firmly and letting it sit undisturbed for 3 minutes to develop a crust.
Sprinkle in the garlic powder, ginger powder, sea salt, and black pepper.
Pour in the tamari and gochujang, tossing everything together until the rice is evenly coated.
Create a space in the center of the pan, crack the egg into it, and scramble until just set before mixing into the rice.
Serve hot, garnished with thinly sliced green onions and toasted sesame seeds.