The text of the Ojo uragaki _??__??__??__??_ is owned by the Kanagawa Prefectural Kanazawa-bunko Museum. This is a fragmentary version consisting of 14 sheets and lacking the introductory and final parts. “Ojo uragaki _??__??__??__??_” apparently was a provisional title. The formal title of the work is unknown. However, I compared it with the Ojo yoshu uragaki _??__??__??__??__??__??_ version in the Shimpuku-temple _??__??__??_, and my conclusion is that they are almost identical texts and that the original title was “Ojo yoshu uragaki _??__??__??__??__??__??_”.
The Ojo yoshu uragaki _??__??__??__??__??__??_ is an an annotation of the Ojo yoshu _??__??__??__??_ by Shingen _??__??_ (1064-1136). The work actually represents an investigation into the textual sources of the Ojo yoshu _??__??__??__??_.
I compared the Kanazawa-bunko version of the Ojo yoshu uragaki with the Shimpuku-ji version, and the characteristics of the former became clear: 1) Judging from the number of its Chinese characters, the Kanazawa-bunko version represents a third of the Shimpuku-ji text. 2) The sheets in the Kanazawa-bunko version are not arranged in the correct order. 3) The missing introductory part amounts to about 3 sheets.
The Ojo yoshu uragaki _??__??__??__??__??__??_ has been so far known only in its Shimpuku-ji version. The discovery of the Kanazawa-bunko version makes it possible to collate the two texts and opens the way for a critical edition. I hope that my diplomatic edition and study will contribute to this.