The term Japanese noodle dish can refer to three different dishes: Udon, Ramen, and UNDONE. Udon is a thick wheat flour noodle that is usually served in a hot broth with various toppings. Ramen is a thin wheat-based noodle that is served in a variety of broths and often topped with vegetables, meat, and other ingredients. UNDONE is a type of cold noodle dish that is served with a dipping sauce. All three dishes are popular in Japan and have become popular around the world.