Add all ingredients in a 5 quart sauce pan. Bring to a boil for 1 minute and let simmer. Do not boil too long. At the same time, prepare Udon or Sobe noodles in a separate sauce pan by cooking the noodles in boiling water for 7 minutes. Wash the noodles when they are done so they don't stick together. When the vegetables in the soup are softened slightly, the alcohol is cooked off, and the noodles are cooked; put the noodles in individual serving bowls and ladle the soup over them. Top with fresh chopped green onion.
This is an authentic Japanese recipe. Its delicious. Get the ingredients at an Asian Market like H Mart in Carrollton, Tx