The 'broth' at Kobe japanese steakhouse restaurants?

What is the name of the broth/soup served at kobe and how is it made? Also, what is in the squirt bottles that they use to make the noodle dish?The 'broth' at Kobe japanese steakhouse restaurants?
Miso Soup -- In those bottles are mirin, soy sauce, etc...





.INGREDIENTS

2 teaspoons dashi granules

4 cups water

3 tablespoons miso paste

1 (8 ounce) package silken tofu, diced

2 green onions, sliced diagonally into 1/2 inch pieces







..DIRECTIONS

1.In a medium saucepan over medium-high heat, combine dashi granules and water; bring to a boil. Reduce heat to medium, and whisk in the miso paste. Stir in tofu. Separate the layers of the green onions, and add them to the soup. Simmer gently for 2 to 3 minutes before serving.









~"Dashi is a basic stock used in Japanese cooking which is made by boiling dried kelp (seaweed) and dried bonito (fish). Instant dashi granules are sold in conveniently-sized jars or packets and vary in strength. Add more dashi to your soup if you want a stronger stock. You can use yellow, white or red miso paste for this soup. Yellow miso is sweet and creamy, red miso is stronger and saltier."