There is also a theory that Udon noodles originated in 'Konton' a kind of sweet dumpling introduced from China by Japanese envoys to the Tang Dynasty during the Nara period.
奈良時代に遣唐使によって中国から渡来した小麦粉の餡入りの団子菓子「混飩（こんとん）」に起源を求める説もある。