Cut the pork and kimchi into bite-sized pieces.
Heat cooking oil in a pot and stir-fry the pork.
Once the meat is cooked, add the kimchi and continue to stir-fry.
Add onion, green onion, and garlic, then stir-fry some more.
Pour in kimchi juice, water, red pepper powder, and soy sauce, and bring to a boil.
Add tofu and simmer over medium heat for 10 minutes.
Season with salt and pepper to taste, and it's done.