Broil chicken bones for 7-9 minutes, turning over half way through.
Add all ingredients (including the broiled chicken bones) to a stock pot and bring to a boil.
Let simmer for one hour, reducing by roughly one half
Preparing the Pork Belly Skewers
Cut the pork belly into one inch cubes
Chop Green Onions into 1.5" chunks
Alternate adding pork belly and green onion to the skewer
Grilling the Pork Belly Yakitori
Set up the grill for 350 degrees on direct heat
Add the Pork Belly Skewers to the grill
Check the grill after about five minutes (the bottom should have a nice solid sear)
Turn over the skewers and brush liberally with the Yakitori Sauce
After another five minutes, the pork should be thoroughly cooked and ready to take off the grill
Notes
Let the grilled pork belly rest for 5-10 minutes after taking it off of the grill. Keep a small bowl of Yakitori Sauce for dipping and get some extra delicious flavors!