We have 2 types of soup for Japanese noodles.
One is called Kanto style.
Using a lot of Soya source.
Other is called Kansai style.
Less Soya source to make clear soup and mainly using seaweed for bros.
Kanto means the Eastern area in Japanese, and Kansai means the Western area.
Udon served with Tenpra.
Eating Tenpra together with Udon soup is very tasty.