In 1952, a group of scholars of Tenrikyo Church Headquarters known as the "Kōki Committee" began to prepare a number of drafts of Oyasama's biography. In so doing, they decided to use the research of Nakayama Shinnosuke as the primary historical reference. The first draft was put together by an early Tenrikyo theologian, Ueda Yoshinaru, in the same year. All drafts from the first draft to the seventeenth draft (released 26 August 1955) were referred to as Tenrikyō kyōso den sōan (天理教教祖伝草案).
