Place a large skillet or wok over medium-high heat and add the diced pork belly, cooking until the fat renders and the edges are golden and crispy.
Add the minced garlic and the white parts of the sliced green onions to the pan, sautéing for 1 minute until fragrant.
Stir in the chopped kimchi and cook for another 2 minutes to caramelize the sugars slightly.
Add the chilled cooked brown rice to the skillet, breaking up any clumps with a spatula, and stir to combine with the pork and kimchi.
Pour in the tamari, kimchi juice, and toasted sesame oil, tossing everything together until the rice is evenly coated and heated through.
In a separate small non-stick pan, fry the eggs to your preference, ideally leaving the yolks slightly runny.
Divide the fried rice into bowls, top each with a fried egg, and garnish with the remaining green onion tops, sea salt, and black pepper.