Cut the pork belly and kimchi into bite-sized pieces.
Lay the pork belly in a pot.
Place the kimchi on top of the pork belly.
Chop and add onion, green onion, and garlic.
Sprinkle red pepper powder, soy sauce, sugar, and black pepper.
Pour 100ml of water, cover with a lid, and bring to a boil.
Simmer over medium-low heat for 30 minutes until cooked through.
Check the consistency of the broth and finish.