"Wakan-sansai-zue" (an encyclopedia compiled in the Edo period) (compiled by Ryoan TERASHIMA, 1713) contains a statement that 'shoingami produced at Terao in Mino Province had the best quality, Suo Province had the second best quality, and Iwaki in Mutsu Province, in Shimotsuke and Nasu Provinces, and in Hiroshima in Aki Province had the third best quality.'
『和漢三歳図絵(わかんさんさいずえ)』（寺島良安編1713年）には、「美濃国寺尾より出るものもっとも佳し。周防国之に次ぎ、陸奥国岩城、下野国、那須、安芸国広島、また之に次ぐ。｣とある。