Press the pork slices between stacks of paper towels to remove surface moisture.
Roll up each slice into a log.
Thread the rolled pork belly with bamboo skewers.
Brush or spray a frying pan with oil and heat.
Lay the skewered pork in the oil in a single layer and sear on all sides until lightly browned.
Mix all the ingredients for the teriyaki sauce and pour in.
Bring the sauce to a boil, set the heat to low, cover the pan and braise the skewered pork, turning them over every few minutes, until most of the sauce has been soaked up.
Continue cooking the pork in the rendered fat, turning them over often, until the sauce caramelizes and forms a glaze on the surface of the meat.