Signatures on some letters show that it was read by intellectuals such as government official, students, shosei (a student who is given room and board in exchange for performing domestic duties), village officer, former warrior class, wealthy farmer and wealthy merchants.
数々の投書にある署名からして、官吏や学生、書生、村役人、旧士族、豪農、豪商など知識人層に読まれていたことが分かる。