○福井久蔵の『校本菟玖波集新釈』を中心とした、連歌研究業績への再検証を進めた。この校本に使用された、菟玖波集の写本の画像・コピーをいくつか購入したが、このうち福井が底本に採用した学習院大学附属図書館蔵本（阪家旧蔵、江戸後期写、４冊）が重要である。この本は紫筆で里村昌逸家蔵、玄陳玄俊両筆本が寛政10年7月下旬に、朱筆で石川周良蔵、玄俊玄陳両筆本が寛政10年4月に、青墨で一橋儀同殿御本古写本が文政8年9月に、それぞれ校合され、異文が書き入れられている。とくに重要な里村昌逸蔵本の本文は紫筆であり、カラー画像でないと判読不可能であったが、購入することができたのは有意義であった。検証の結果、学習院本を底本とし、他本で校合したとされる『校本菟玖波集新釈』や朝日古典全書『菟玖波集』は、本文が底本そのままではなく、断りなく多数の箇所が校訂されており、校本として使用するには大いに問題があることも浮上して来た。
○正宗敦夫の著作を研究した。とくに晩年の書誌学・考証学に関する随筆を発掘した。金光図書館の図書館報『土』に連載された、「穂波だより」「ふぐらにこもりて」がそれで、敦夫が蒐集した典籍、具体的には桂園派歌人、岡山藩儒学者、その他郷土の国学者・歌人たちの著作について平易に解説するもので、それは研究としても唯一無二、現代でもなおまず参照すべき水準にある。逝去直前まで41編にわたって書き継がれた。今回、正宗家と金光図書館との許可を得て、今では稀覯となったこの41編を覆刻し、『調査研究報告』43号に掲載することを得た。正宗文庫に現在も所蔵されるそれら典籍との照合を可能な限り行って、随筆本文を校訂し、必要に応じて略注を付した。あわせて解題と人名・書名の索引を編み、正宗敦夫の学者としての業績を再び世に出し、広く活用されるための便宜とした。
1.The study of renga by Fukui Kyuzo was re-examined. Some copies of the manuscripts of the Tsukubashu used in the" Kohon Tsukubsashu Shinshaku" were purchased. Of these, the most important is the manuscript in the Gakushuin University Library (formerly owned by the Saka family, late Edo period copy, four volumes), which Fukui adopted as the source material. In purple handwriting, the Satomura Shōitsu collection copy is dated late July 1798, the Ishikawa Shūryō collection copy is dated April 1798 in red ink, and the Hitotsubashi Harunai collection copy is dated September 1818 in blue ink. The text of the particularly important Satomura Shoitsu collection is written in purple and is illegible without a colour image, but it was worthwhile to be able to purchase it with the funds available. The result of this research was the emergence of the fact that the text of the "Kohon Tsukubsashu Shinshaku" and the Asahi Koten Zensho edition of "Tsukubashu", which are said to be based on the Gakushuin version and to have been collated in other versions, were not written in the Gakushuin version, and were not rejected, but the text was collated, which is highly problematic for their use as a school text.
2. The works of Atsuo Masamune were studied. In particular, essays on bibliography and archaeology from his later years were unearthed. The essays, "Honami Dayori" and "Fugura ni kokomorite", were serialised in the Konko Library's library bulletin "Tsu-chi", and provide a simple explanation of the books collected by Atsuo, specifically the works of the Keien School poets, Okayama Clan Confucian scholars and other local scholars and poets. It is unique as a study and should still be referred to first and foremost even today. It was written in 41 editions until shortly before his death. This time, with the permission of the Masamune family and the Konko's Library, we were able to reprint these 41 editions, which are now rare, and publish them in the Research Report No. 43. The text of the essays has been revised and, where necessary, abbreviated notes have been added. In addition, an index of titles and names of people and books has been compiled to facilitate the reintroduction of Masamune Atsuo's achievements as a scholar and to make them widely available to the public.