When Masaaki SENGOKU, the lord of the Ueda Domain in Shinshu, which was the major soba producing area in the Edo period, transferred to the Izushi Domain, he brought many soba chefs along to his new territory and it is considered that the Izushi soba tradition began.
これは江戸時代に蕎麦の本場だった信州上田藩の藩主仙石政明が出石藩に国替えとなった際、大勢の蕎麦職人を連れて来て以来の伝統とされる。