This soup, popular in Hawaii, owes its heritage to a variety of Asian cultures including China, Japan, and the Philippines. Similar to ramen, it is a noodle soup, but this soup is made distinctly Hawaiian by the inclusion of the much beloved Spam.
Combine the water and salt in a large pot and bring to a boil. Add the soba noodles and boil for about 5 minutes, or until cooked al dente. Strain the noodles, and set aside.
Add the chicken broth and ginger to the large pot, and bring to a simmer. Then, reduce the heat to low, and add the soy sauce, sliced spam, carrots, bok choy, and green onions. Simmer for about 5 minutes or until cooked to your preference. Ladle the soup into 6 bowls, evenly distributing the toppings.
Add a poached egg to each bowl, and garnish with the Naruto slices. Serve.