My co-worker, who spent a few years teaching english in Japan, demanded that I try this when I got my first wok. If you don't have access to an asian food store, you can order Nanami Togarashi (a Japanese chili pepper blend) from one of many mailorder places online. It's well worth the effort to get it as it really makes this dish. The pickled ginger really adds another layer to the flavor as well. I actually make it with salmon instead of pork most of the time, as well as double the sauce and add more broccoli and mushrooms. This is the meal that my wife requests the most often by far.