Make onion soy sauce. Grate onion finely. Mix onion, soy sauce, sake, and honey well. Set the mixture aside.
Make vertical incisions at 1" (2.5 cm) intervals between the lean and fatty parts of the pork chops, creating shallow cuts. Pound the meat a few times with a rolling pin. Season with salt and then lightly coat with flour.
Heat oil in a frying pan at medium heat. Place the prepared pork and cook for 2-3 minutes. Once browned, turn over, and cook an additional couple of minutes. Remove any excess oil from the pan using a paper towel. Add the onion soy sauce, and cook and stir for another minute.
Slice into approximately 6 pieces and plate the pork, then spoon the sauce over it. Serve with some vegetables.