Cut the pork into bite-sized pieces.
Cut the kimchi into manageable pieces.
Add some oil to a pot and stir-fry the pork.
When the pork is about halfway cooked, add the kimchi and onion and continue to stir-fry.
Pour in water and kimchi juice, then bring to a boil.
Season with gochugaru (Korean chili powder), sugar, and soy sauce.
Add potatoes, tofu, and green onion, then simmer on medium heat.
Once all ingredients are fully cooked, turn off the heat and serve.