Scholarship on the Collection
Yale Library Guide to Scholarship on the Collection
A list of some of the important work on the Yale Japanese collections can be found here
Historiographical Institute Guide to Yale's Premodern Japanese Books and Manuscripts
From 2010 to 2015, a team of scholars from the Historiographical Institute at Tokyo University, led by Professor Kondō Shigekazu, conducted a comprehensive study of the Yale University Library’s extensive collections of pre-20th century Japanese materials. The full report of their findings, including annotated catalogs and explanations of individual items, can be found here.
Princeton's Tom Conlan on the Heishi (Awazu) Monjo
Professor Tom Conlan of Princeton University provides a comprehensive explanation of the contents of the Heishi Monjo, an important set of medieval documents in the Yale collection, on his website here.