The northern limit where it was possible to grow ganpi (a plant of Thymelaeaceae) was Kaga Province, and as torinoko paper became popular in Kyoto, good torinoko paper had been produced by polishing further the excellent skills from limited materials in Kaga and Echizen Provinces, which built their names as a famous producing district.
ガンピ（ジンチョウゲ科の植物）の生育する北限は加賀で、都で鳥の子の名声が上がるにつれて、加賀国や越前国では限られた原料で、優れた技術にさらに磨きをかけて良質な鳥の子を生産して名産地としての名を築いた。