Regarding Udon noodles as simple everyday dishes, substitutes for boiled rice, and foods of 'hare and ke' (unusual events and daily events) served at festive events, Japanese people nationwide have eaten them from ancient times.
手軽な庶民食、米食の代用食として、また祝い事に際して振る舞われる「ハレとケ」の食物として、古くから日本全国で食べられてきた。