Combine the pork, breadcrumbs, garlic, ginger, sesame seeds, sesame oil, shichimi togarashi, green onions, egg and salt and pepper in a bowl.
Place the vegetable oil in a deep sided roasting pan and place in the oven for 5 minutes.
Roll a tablespoon of the pork into balls and set aside. Remove the pan from the oven and carefully place the meatballs in the pan. Return to the oven and bake for 5 minutes.
Combine the dashi powder, soy sauce, mirin, sesame oil, rice wine vinegar and honey in a small bowl.
Remove the pan from the oven and carefully add the sticky soy sauce mixture, tossing gently to coat. Return to the oven and cook for 15 minutes. Serve with soba noodles and garnish with fresh shiso leaves.