Preheat the oven to 400°F (200°C) and line a baking sheet with aluminum foil or parchment paper.
In a medium mixing bowl, combine the low sodium soy sauce, honey, rice vinegar, sesame oil, minced garlic, and grated ginger. Whisk until fully blended.
In a separate small bowl, mix the cornstarch and water together until smooth. Pour this slurry into the teriyaki sauce mixture and stir until combined.
Pat the chicken drumsticks dry with paper towels. Place them in a large mixing bowl or zip-top plastic bag. Pour half of the teriyaki sauce over the chicken, reserving the rest. Toss to coat the drumsticks evenly.
Arrange the marinated drumsticks on the prepared baking sheet, leaving space between each piece. Bake for 30 minutes.
After 30 minutes, remove the drumsticks from the oven. Brush the reserved teriyaki sauce onto the drumsticks, flipping them to glaze both sides.
Return the drumsticks to the oven and bake for an additional 15-20 minutes until cooked through and caramelized.
Remove the drumsticks from the oven and let them rest for a few minutes.
Before serving, sprinkle sliced green onions and sesame seeds over the drumsticks.
Notes
Serve with steamed rice and sautéed vegetables for a complete meal.