Shinnyo

The proceeds allowed Shinnyo sufficient leisure time to study Buddhism, and she became well-educated in Buddhist doctrine, composing a number of commentaries and studying under the monk Ze-Amidabutsu. In 1243, the priest Sōji submitted a petition to his uncle Eison, the founder of the Shingon Risshu sect, requesting that the Chūgū-ji temple be revived as a nunnery; Eison chose Shinnyo to head this project. The following year, Shinnyo decided to seek full ordination as a nun, an honour that had not been granted for several hundred years. She approached Eison's associate Kakujō requesting ordination, but was initially refused. Kakujō stated that he would only accept her request if he received a sign from Heaven, which he experienced shortly after his refusal. He therefore contacted Shinnyo and by 1249 had bestowed upon her the full precepts of a Buddhist nun (bhikkhuni).

Around 1262 Shinnyo moved to Chūgū-ji to begin the restoration work. Her initial efforts focused on the restoration of the Tenjukoku Shūchō Mandala, a large embroidered artwork commemorating Prince Shōtoku. Shinnyo's interest in the work stemmed from her researches into Shōtoku's mother, , the patroness of Chūgū-ji, whose date of death was included in the mandala; it was Shinnyo's intention to hold a commemorative ceremony honouring Hashihito. After obtaining the mandala, Shinnyo took it on a fund-raising tour, and by 1282 had raised enough money to create a replica of the mandala and to fund the ceremony for Hashihito. During this time, she became moderately well known at the Imperial Court, and made patrons of many highly ranked ladies of the nobility.

In 1282 Shinnyo recorded her biography in a work known as the Ama Shinnyo ganmon ("Vows of Shinnyo"); this work emphasises the importance of her actions in the restoration of Chūgū-ji, and downplays the contributions of Eison and Sōji.