Udon [ cooking ]Udon is a Japanese noodle made from wheat flour. Very famous in Shikoku (especially the Sanuki Udon). The Udon was introduced in Japan by Kūkai (空 海), in the 9th century, from China. Very popular dish, the Udon can be enjoyed hot or cold (especially in summer). However, for a long time the consumption of Udon was mainly reserved for Buddhist monks (until the 17-18th century).