3 pounds beef short ribs
1 Asian pear - peeled, cored, and coarsely chopped
1 small onion, chopped
4 cloves garlic, chopped
1/2 tablespoon peeled and coarsely chopped fresh ginger
1 cup low-sodium soy sauce, divided
1/4 cup rice wine
1/4 cup water
1/4 cup brown sugar
2 tablespoons sesame oil, divided
1/2 teaspoon ground black pepper
2 carrots, peeled and cut in chunks
5 radishes, peeled and cut into chunks
1/4 cup white sugar
1/2 bunch green onions, chopped, or to taste
1 tablespoon sesame seeds, or to taste