Several works, namely the "Ansai essay" by Teijo ISE (1784), the "Gisho ko" (a book about gisho) and the "Fuken guki" by Masahide KOMIYAMA (Fuken), claim that gisho were quite widespread.
その横行は伊勢貞丈の安斎随筆（1784年）、小宮山昌秀（楓軒）の『偽書考』・『楓軒偶記』に記載されている。