It is said that a paper making engineer left the Iwamoto-mura village, a famous production area of Echizen torinoko, for some reason, and reached Najio, another production area, and invented doromaniai-shi (fusuma paper that incorporates soil).
越前鳥の子の名産地の岩本村で、紙漉きの技術者が何らかの事情で村を出て、紙漉きの名塩に辿り着き、泥間似合紙を工夫開発したものといはれている。