Make the ramen noodles per package instructions, strain and set aside.
In a soup pot, bring the 4 cups water to a boil.
While the water is heating up, season the pork chops with salt and pepper, then sear both sides in a skillet. Cut into 2" strips and set aside.
in a small bowl, whisk the miso paste with a little warm water to make a thinner paste. When the water in the bot begins to boil, add the paste. When the broth comes back to a boil, add the onions and leek and reduce to simmer for 5 minutes.
to make the tonkatsu sauce whisk together the ketchup, Worcestershire sauce, oyster sauce and sugar.
Add the pork chop strips and tofu and simmer another 5 minutes til pork is fully cooked.
Build the ramen bowls- broth, noodles, a couple strips of pork topped with the tonkatsu sauce, 1 egg halved. Garnish with green onion.