Udon is a thick noodle made from wheat flour, used in Japanese cuisine. There is a variety of ways it is prepared and served. Its simplest form is in a soup as kake udon with a mild broth called kakejiru made from dashi, soy sauce, and mirin. It is usually topped with thinly chopped scallions. Other common toppings include prawn tempura, kakiage, abura-age, kamaboko, and shichimi spice added to taste.

Japanese cuisine encompasses the regional and traditional foods of Japan, which have developed through centuries of political, economic, and social changes. The traditional cuisine of Japan is based on rice with miso soup and other dishes with an emphasis on seasonal ingredients. Side dishes often consist of fish, pickled vegetables, and vegetables cooked in broth. Common seafood is often grilled, but it is also sometimes served raw as sashimi or as sushi. Seafood and vegetables are also deep-fried in a light batter, as tempura. Apart from rice, a staple includes noodles, such as soba and udon. Japan also has many simmered dishes, such as fish products in broth called oden, or beef in sukiyaki and nikujaga.