Soak wooden skewers in water for at least 20 minutes to prevent burning during the cooking process.
Slice the pork tenderloin into uniform 1-inch cubes to ensure even cooking and a tender texture.
In a small bowl, whisk together the gochujang, tamari, sesame oil, honey, grated ginger, and minced garlic until smooth.
Toss the pork cubes in half of the prepared gochujang glaze and let them marinate for 15 minutes.
Cut the red bell pepper and zucchini into 1-inch chunks that match the size of the pork cubes.
Thread the marinated pork and vegetable pieces onto the skewers, alternating them for a colorful presentation.
Sprinkle the assembled skewers evenly with the sea salt and black pepper.
Preheat a grill or cast-iron skillet over medium-high heat and cook the skewers for 3-4 minutes per side until charred.
Brush the remaining glaze onto the hot skewers and garnish with sesame seeds immediately before serving.