Japanese noodle types are a popular part of Japanese cuisine. Udon is a thick, wheat-based noodle that is usually served in a hot broth. It is often topped with various ingredients such as tempura, fish cakes, and seaweed. Ramen is a thin, wheat-based noodle that is usually served in a hot broth. It is often topped with various ingredients such as pork, egg, and vegetables. Both udon and ramen are popular dishes in Japan and around the world.