However, according to 'a book of research' and "Encyclopedia of The Tale of Genji," close investigation of some of the manuscripts during the Edo period was also carried out, so it is considered that the broader range of manuscripts were investigated than the manuscripts mentioned above.
但し「研究編」や『源氏物語事典』の記述を見ると江戸時代の写本についても詳細に調査しているものがあるため、写本の調査自体はこれより広い範囲の写本に対して行われたと見られる。