Princess Seishi

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Princess Seishi
Empress consort of Japan
TenureMarch 26, 827 – March 26, 833
DiedApril 18, 879(879-04-18) (aged 68–69)
Spouse Emperor Junna (m. 827–840)
Father Emperor Saga
Mother Tachibana no Kachiko

Princess Seishi(正子内親王,Seishi Naishinnō, 810 – April 18, 879) was an Empress consort of Japan. She was the empress consort of her paternal uncle Emperor Junna.

Emperor Junna was the 53rd emperor of Japan, according to the traditional order of succession. Junna reigned from 823 to 833.

She became empress in 827. Her husband abdicated in 833. Either when she was widowed in 840, or when her son was deposed as crown prince in 842, Seishi followed the example of her mother and became a nun: she retired to the palace of her late spouse, Junna'in, which she made in to a family convent, engaging in sponsoring lectures of the Lotus Sutra and providing care for orphans. [1]

The Lotus Sūtra is one of the most popular and influential Mahayana sutras, and the basis on which the Tiantai, Tendai, Cheontae, and Nichiren schools of Buddhism were established. According to Paul Williams, "For many East Asian Buddhists since early times the Lotus Sutra contains the final teaching of the Buddha, complete and sufficient for salvation."


  1. Barbara R. Ambros, Women in Japanese Religions

Japanese royalty
Preceded by
Tachibana no Kachiko
Empress consort of Japan
Succeeded by
Fujiwara no Onshi
(Posthumously: Princess Koshi)

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