In a large bowl or dish, mix together soy sauce, brown sugar, sesame oil, rice vinegar, honey, garlic, ginger, and black pepper.
Add the beef short ribs to the marinade and mix well, making sure all the ribs are evenly coated.
Cover and refrigerate for at least 2 hours, or overnight for best results.
When ready to cook, preheat the grill to medium-high heat (375-400 degrees Fahrenheit).
Remove the marinated ribs from the fridge and let them sit at room temperature for 15 minutes before grilling.
Grill the ribs for about 5 minutes on each side, or until they are nicely charred and cooked to your desired level of doneness.
While grilling, brush the ribs with the remaining marinade using a basting brush.
Once fully cooked, remove the ribs from the grill and let them rest for 5 minutes before serving.
Garnish with chopped green onions and sesame seeds, if desired.
Serve hot and enjoy your delicious Korean barbecued beef short ribs!