Take your cooking pot and add 600 ml water and 5 g dried kelp (kombu). Leave to soak at room temperature for 30 minutes.
Place the pot on the stove and add 4 chicken drumsticks. Heat until almost boiling, then remove and discard the kombu. Scoop out any scum that floats to the surface of the broth.
Add 1 carrot and 4 slices kabocha squash. Simmer over medium-low heat for 5 minutes with the lid on. If using additional hardy root vegetables, add them in this step.
Season the broth with 1 tbsp curry powder, 1 tbsp Japanese dark soy sauce (koikuchi shoyu), 1 tbsp sake, 1 tbsp mirin, ½ tbsp Chinese-style chicken bouillon powder and 1 tsp chili bean sauce (toban djan). Mix until combined.
Place 6 black tiger shrimp, 50 g shimeji mushrooms, 2 leaves Napa cabbage, 1 Japanese leek (naganegi) and 1 green bell pepper in the broth. Sprinkle the top with 4 tbsp preferred shredded melting cheese and place 1 tomato in the center.
Cover with a lid and continue to simmer for 5 minutes or until the chicken and shrimp are cooked through and the vegetables are softened to your liking.
Serve and eat up all of the ingredients in the broth.
Add 2 ptns cooked ramen noodles to the leftover soup. Enjoy!
Notes
Chicken bouillon powder varies by brand. My brand is 1 tsp per 200 ml, so if yours is more concentrated (e.g., 1 tsp per 300 ml or 1 cup), use touch less to avoid oversalting.Note: While the nutritional information includes the full serving of broth, most people in Japan don't actually finish all the soup.