Since Masayuki HOSHINA, the founding lord of the Aizu-Matsudaira family, was reportedly a big soba lover and since the Aizu clan had a very close relationship with the Takato clan of Shinano Province for more than twenty years, soba was eaten with the miso-seasoned 'karatsuyu' (salty sauce) (made from miso, grated daikon radish and green onions) in this area.
会津松平家の初代藩主保科正之は大変なそば好きだったと伝えられており、また二十数年信濃国高遠藩との密接な関わりがあり、この地域では味噌味（みそ+大根おろし+ネギ）のそばつゆ「からつゆ」にて蕎麦が食されていた。