Take a large pot and add 600 ml dashi stock, 2 tbsp sake, 1 tbsp mirin, 3 tbsp Japanese light soy sauce (usukuchi shoyu), ¼ tsp salt and ½ tsp grated ginger root. Mix it well.
Add 200 g potherb mustard (mizuna), 4 leaves Napa cabbage, 2 fresh shiitake mushrooms, 2 sheets fried tofu pouch (aburaage) and 300 g thinly sliced pork belly to the cold broth, then place a lid on top and heat on medium.
Bring the broth to a simmer and cook with the lid on for about 10 minutes, or until the pork is cooked through and the vegetables are softened to your liking.
Grate ½ daikon radish using a Japanese oroshi grater. (Alternatively, you could use a microplane grater or similar fine grater.) Once grated, squeeze out the excess water.
Once all your ingredients are cooked, add the grated daikon to the pot and sprinkle with 2 tbsp finely chopped green onions and ground black pepper. Drizzle with 1 tbsp toasted sesame oil.
Serve and add yuzu kosho or Japanese chili powder (shichimi togarashi) to taste. Enjoy!
Notes
Feel free to substitute local ingredients, but maintain similar types. Use alternative cabbages for Napa cabbage, and different mushrooms for shiitake. The cabbage is especially important as it adds water to the soup.Choose well-marbled, thinly sliced pork cuts for the best flavor.Both yuzu kosho and shichimi togarashi are optional condiments for those who like to add a spicy element.For a noodle finish: after eating the vegetables, you can add cooked udon or soba noodles. Boil them separately, drain, then add to the leftover broth.Note: While the nutritional information includes the full serving of broth, most people in Japan don't actually finish all the soup.