In a mixing bowl, combine soy sauce, honey, minced garlic, rice vinegar, sesame oil, and black pepper to create the marinade.

Place the chicken thighs in a large resealable bag or shallow dish and pour the marinade over them, ensuring they are well-coated. Seal the bag or cover the dish and refrigerate for at least 1 hour or up to overnight.

Preheat your oven to 425°F (220°C). Line a baking sheet with foil or parchment paper for easy cleanup.

Arrange the marinated chicken thighs skin-side up on the prepared baking sheet. Pour any remaining marinade over the top.

Bake in the preheated oven for 30-35 minutes or until the chicken reaches an internal temperature of 165°F (74°C) and the skin is crisp.

Once cooked, remove from the oven and let it rest for 5 minutes. Garnish with sliced green onions before serving.