Trim fat and silver skin from the meat and cut into 2" x 1" x 10" strips.
Combine all marinade ingredients; mix well. Add pork and toss to cover with the marinade. Cover and set at room temperature for at least 1 hour or refrigerate 3 hours, or overnight. Turn every 30 minutes or so.
Preheat oven to 375°F. Place a wire rack on top of a sheet pan lined with foil. Place the marinated strips of pork on top. Roast the meat on the center rack of the oven for 20 minutes.
Turn oven to 450°F. Mix the honey and mirin. Brush the strips of pork with the mixture, and then sesame oil. Roast 5 minutes, then turn the pieces over, brush the other side of the meat.
Roast an additional 5 minutes. Flip one more time, brush with sauce and sesame oil and roast 2 more minutes.
The meat should be cooked to an internal temperature of at least 135-140°F is reached. Slice into ¼-inch pieces or refrigerate for up to 3 days.
Serve the char siu with your favorite vegetables and rice.