A theory suggests that the noodles originated in Ise Udon, which was introduced there by Ise merchants who engaged in the trade by shogunate-licensed trading ships called Shuinsen in the first half of the seventeenth century.
17世紀前半の朱印船貿易時代の伊勢商人が持ち込んだ伊勢うどんをルーツとする説がある。