Combine soy sauce, sherry, garlic, ginger, and sesame oil; place in heavy food storage bag with pork. Turn bag to coat pork; refrigerate and let marinate for 3 to 4 hours, turning occasionally.
Combine honey and brown sugar. Rub all over the pork then roll pork in sesame seeds to coat well. Roast at 375° 25 to 30, minutes or until done.
Adapted from National Pork Producers recipe.