Combine soy sauce, grated ginger, honey, rice vinegar, sesame oil, and black pepper in a mixing bowl. Whisk until the honey is fully dissolved.
Place the salmon fillets in a shallow dish or resealable bag and pour the marinade over them. Turn once to coat evenly and marinate for 10–20 minutes in the refrigerator.
Heat a skillet over medium-high heat. Remove the salmon from the marinade, letting excess drip off, and place the fillets skin-side down in the hot pan.
Cook for 4–5 minutes until the skin is crisp and golden. Flip the fillets and cook for another 4–5 minutes, until the salmon flakes easily.
During the final minute of cooking, spoon a small amount of the marinade over the salmon to create a glossy glaze.
Transfer the salmon to serving plates and let rest for 1 minute before serving. Garnish with sesame seeds or scallions if desired.