Prepare the Cutlets – Trim fat, pound cutlets to even thickness, and season lightly with salt and pepper.
Coat the Meat – Dredge each cutlet in flour, dip into beaten eggs, then press into panko breadcrumbs until fully coated.
Fry – Heat oil to 350°F (175°C). Fry cutlets for 3–5 minutes per side, or until golden brown and cooked through. Drain on paper towels.
Make the Sauce – Whisk ketchup, Worcestershire, soy sauce, sugar, and Dijon mustard until smooth. Adjust sweetness or tang to taste.
Assemble the Bowl – Add steamed rice to bowls, top with sliced katsu, drizzle with Tonkatsu sauce, and garnish with shredded cabbage or sesame seeds.