Cut the radish into bite-sized pieces.
Pour anchovy broth into a pot and bring to a boil.
When the broth boils, add the radish.
Mix soy sauce, sugar, chili powder, minced garlic, and chopped green onion to make a seasoning sauce.
Spread the seasoning sauce evenly over the radish.
Simmer over medium-low heat until the radish is cooked through.
When the broth is reduced, finish with sesame oil and pepper.