Soak wooden skewers in water for 20 minutes to prevent burning during the grilling process.
Cut the pork tenderloin into 1-inch cubes and season evenly with sea salt and black pepper.
In a small bowl, whisk together the gochujang, tamari, honey, sesame oil, grated ginger, and minced garlic until smooth.
Thread the pork cubes and scallion pieces onto the skewers, alternating between the meat and the scallions.
Preheat a grill pan or outdoor grill to medium-high heat and lightly coat the surface with a high-heat oil.
Grill the skewers for 3 to 4 minutes per side, brushing generously with the gochujang glaze during the final 2 minutes of cooking.
Remove the skewers from the heat once the pork is cooked through and the edges have developed a slight char.
Garnish the skewers with sesame seeds and serve immediately while hot.