-
1
Combine the rice vinegar, sugar, and salt for the namasu. Toss with the julienned daikon and carrot. Allow to macerate for at least 20 minutes. The vegetables are ready when they have softened slightly and taken on a translucent appearance, and the brine smells clean and gently acidic.
-
2
Pound the chicken to an even thickness. Dredge in flour, pass through the beaten egg, then press firmly into the panko so the coating adheres without bare patches. The surface should appear uniformly white and dry before it meets the oil.
-
3
Heat the oil in a wide pan over medium heat. Shallow-fry the coated chicken for 3–4 minutes per side. The katsu is done when the crust is deep golden-brown and the oil around the cutlet has quietened from a vigorous sizzle to a low hiss.
-
4
Drain the katsu on a rack. Slice into strips. This is where the dish lives or dies: the bento must contain protein, starch, pickle, and something fresh — warm rice packed into its compartment, katsu strips alongside, takuan slices and drained namasu in separate compartments, and the piece of fruit completing the box. A box missing any of these four elements is an incomplete meal, not a bento.