Ogawa Sojo - Ogawa Sojo

...The manners for the initiation and various practices of esoteric Buddhism became complicated and diversified from the end of the Heian period, and numerous schools of secret teachings were born. Shocho, known as Ogawa Sojo, studied under Kakushin, Chukai, and others, and compiled the theories and oral traditions of the various schools of Taimitsu, arranging them by section to create this book, which compiled the teachings and manners of Taimitsu. The three characters A, Sa, and Boku are the seeds (shuji) that represent the Buddha, Lotus, and Vajra sections of the Garbha-kai, respectively, and represent the entire Garbha-kai. ...

*Some of the terminology that refers to "Ogawa Sojo" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…密教の灌頂（かんぢよう）や種々の行法に関する作法は，平安時代末から複雑に分化し，数々の流派による秘伝が生まれた。小川僧正と呼ばれた承澄は，覚審，忠快らに学び，台密諸流の学説･口伝を集めて部門ごとに整理して本書を作り，台密の教学と作法を集大成した。阿，娑，縛の3字はそれぞれに胎蔵界の仏部，蓮華部，金剛部を示す種子（しゆじ）で，胎蔵界のいっさいを示している。…

※「小川僧正」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報