Remove the pits from the pickled plums and mash them into a paste. Cut the stems off the shiso leaves and slice them in half lengthwise. Cut the processed cheese into 4 equal pieces.

Lay the pork slices flat on a cutting board and season with salt and pepper. Place 2 shiso leaf halves on each slice, spread the plum paste, and add a piece of cheese. Roll tightly from one end and secure the roll. Repeat for all 8 rolls.

Coat each roll in flour, then dip into the beaten egg, and finally cover with breadcrumbs.