The Life of Oyasama, Foundress of Tenrikyo (稿本天理教教祖伝 Kōhon Tenrikyō Kyōso den), or The Life of Oyasama, is the biography of Nakayama Miki published and authorized by Tenrikyo Church Headquarters. The Life of Oyasama is one of the supplemental texts (準原典 jun-genten) to the Tenrikyo scriptures, along with The Doctrine of Tenrikyo and Anecdotes of Oyasama.

History

Background
Efforts to compile a biography of Nakayama Miki began not long after her death in 1887. An instruction recorded in the Osashizu, dated 13 October 1890, requested that the followers produce a record of Nakayama's life. In response to this request, Nakayama Shinnosuke, the first Shinbashira, supervised the composition of the script for the Besseki lectures, which was completed in 1896. Based on this script, Nakayama Shinnosuke wrote a biography dated 3 July 1898 (referred to as the katakana version) and another one around 1907 (the hiragana version). Nakayama Shinnosuke's hiragana version became the basis of future biography compilations including The Life of Oyasama. 

Besides Nakayama Shinnosuke's writings, a number of other writings containing biographical information were produced by various individuals. When the Tenrikyo followers made a written request in December 1886 to establish a church, four early Tenrikyo leaders – Kōda Chūsaburō, Shimizu Yonosuke, Moroi Kunisaburō, and Masuno Shōbei – submitted Saisho no yurai (最初之由来) along with the request. In 1891, Hashimoto Kiyoshi wrote Tenrikyōkai yurai ryakki (天理教会由来略記), which was written to be submitted to groups outside the church. During the church's efforts to obtain sectarian independence at the turn of the century, Tenrikyo Church Headquarters commissioned biographies from non-Tenrikyo writers, Udagawa Bunkai in 1900 and Nakanishi Ushirō in 1902. Around this time Tenrikyo followers such as Okutani Bunchi and Masuno Michioki independently wrote biographies as well.

In 1925, the Department of Doctrine and Historical Materials was founded. The department gathered historical materials and produced "The Life of Oyasama; with Revised Historical Data" (御教祖伝史実校訂本) around 1936. This was later published in volumes 29, 30, 32, 37, and 47 of the journal Fukugen (復元).

Compilation
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 In so doing, they decided to use the research of Nakayama Shinnosuke as the primary historical reference.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).

The eighteenth draft was prepared on 18 October 1955. From this draft to the twenty-second draft (17 March 1956) are referred to as  Tenrikyō kyōso den kōan (天理教教祖伝稿案). After the release of the twenty-first draft in February 1956, the "16th Doctrinal Seminar" was held to discuss aspects of the draft that still needed improvement. Upon revision of the twenty-second draft, The Life of Oyasama, Foundress of Tenrikyo was published on October 26, 1956. 

Since its first publication, The Life of Oyasama has gone through two revisions. The first revision, published on 26 December 1981, made several historical corrections and additions. The second revision, published on 26 January 1986, changed certain expressions deemed unsuitable.

The English translation has gone through three editions, the first in 1967, the second in 1982, and the third in 1996.

Content
The biography is labeled as a "manuscript edition" (稿本 kōhon) because further revisions may be made to the text in the future as more research is done.

Further reading
Nakayama, S. (1997). Dai 16-kai kyōgi kōshū kai – dai ichiji kōshū roku bassui [The 16th Doctoral Seminar – Transcript Excerpt from the Primary Seminar]. Tenri, Japan: Tenrikyō Dōyūsha.
Yamazawa, T. (1950). Oyasama gyoden hensan shi [Compilation history of the Foundress' biography]. Tenri, Japan: Tenrikyō Dōyūsha.

References

1956 non-fiction books
Biographical books about religious figures
Japanese-language books
Japanese non-fiction books
Tenrikyo