Season pork chops evenly with salt and black pepper on both sides.
Prepare a standard breading station: place flour in the first bowl, beaten eggs in the second, and Panko breadcrumbs in the third.
Dredge each pork chop in flour, shaking off excess; dip into the egg wash, then press firmly into the Panko until fully and evenly coated.
Heat vegetable oil in a heavy-bottomed skillet or deep fryer to 350°F (175°C).
Fry pork cutlets for 3 to 4 minutes per side until the exterior is golden brown and the internal temperature reaches 145°F (63°C).
Transfer cutlets to a wire cooling rack to drain and rest for 5 minutes to maintain crust integrity.
In a small bowl, whisk together the Worcestershire sauce, ketchup, oyster sauce, and sugar until the sugar is fully dissolved.
Slice the rested pork cutlets into 1-inch thick strips.
Divide cooked rice into four bowls, top with a mound of shredded cabbage, place the sliced katsu on top, and drizzle with the prepared Tonkatsu sauce.