Heat a pan over medium heat. Add panko bread crumbs and cook until golden brown, about 1 minute. Add black sesame seeds and cook for 2-3 minutes. Set aside.
Combine butter and miso paste together until they are completely blended. Set aside.
Cover the corn with miso butter and hot sauce. Grill the corn under medium-high heat, turning every few minutes until all sides of the corn have some charring.
Transfer to a plate. Cover with miso butter and garnish with panko mixture.