Place the cucumbers in a colander set over a bowl. Toss them with 1
teaspoon salt and 3/4 teaspoon sugar.
Place each piece of pork between sheets of waxed paper. Pound meat
to 1/8-inch thickness.
Place eggs in a large shallow bowl; whisk in the Worcestershire and
tomato paste. Place the panko and flour in two separate shallow
bowls.
Season cutlets with salt and pepper. Dip each cutlet in the flour
(tap off excess), the egg mixture (ditto), then dredge in panko
crumbs.
Heat a large pan, pour in 1/8 inch of oil and heat for 30 seconds.
Working in batches, put cutlets in the pan. Immediately shake and tilt
it so the oil rolls over the pork in waves (this will give it a lighter,
crisper crust). Shake the pan occasionally, until cutlets are golden on
the bottom, about 3 minutes. Flip them and shake again. Cook 2 to 3
minutes longer. Transfer pork to a paper-towel-lined platter to
drain.
Pat the cucumbers dry with paper towels. Toss with scallions,
vinegar, shiso, soy sauce, sesame oil and 1/2 teaspoon sugar. Serve
cutlets with pickled cucumbers on the side.