01 - Rinse the beef short ribs in cold water to remove any bone fragments. Pat dry thoroughly with paper towels.
02 - In a large bowl, whisk together soy sauce, mirin, water, brown sugar, honey, sesame oil, grated pear, grated onion, minced garlic, grated ginger, black pepper, chopped scallions, and sesame seeds until the sugar completely dissolves.
03 - Add the ribs to the marinade, ensuring they are fully coated. Cover and refrigerate for at least 4 hours, preferably overnight, turning occasionally to distribute flavors evenly.
04 - Preheat a grill or grill pan to medium-high heat, approximately 375-400°F.
05 - Remove ribs from marinade, allowing excess to drip off. Grill for 3-4 minutes per side until caramelized and cooked through with slightly charred edges.
06 - Let the ribs rest for 5 minutes to allow juices to redistribute. Slice into pieces if desired and garnish with sliced scallions and sesame seeds.