Heat a frying pan over medium-high heat, and then add 1 teaspoon vegetable oil and Chili flakes.
When the chilies have stopped sizzling, add the sliced konnyaku and try to spread them out in a single layer. Pan-fry undisturbed until it's browned on one side.
Flip the konnyaku over and brown the second side.
When the konnyaku is browned on both sides, add 1 tablespoon sake, 1 tablespoon soy sauce, and 1 teaspoon sugar and let the sauce reduce until each slice of konnyaku is evenly glazed and no liquid is left in the pan. Finish by sprinkling on ½ teaspoon toasted sesame seeds.