You can find all the ingredients at East Asian markets.
Asian fish cakes, sliced
Daikon (white Asian radish), cut into big chunks
Udon tsuyu (soup base for udon)
Green onions, finely chopped
1. Pour water into the pot and add the anchovies, kelp, and radish. Let it boil for 30 minutes.
2. Reduce heat, remove the ingredients, and add tsuyu. Let it simmer for a couple minutes.
Now the soup part is done.
3. In a serving bowl, add the noodles, fish cakes, and green onions.
4. Pour the soup and serve.