Saikū — 斎宮

For five hundred years, an unmarried woman of the imperial family lived in enforced isolation at Saikū, a palace complex in what is now Mie Prefecture. She was the Saiō — the priestess who served as physical intermediary between the emperor and Amaterasu at Ise Grand Shrine. The position was not voluntary. When an emperor ascended the throne, divination selected an unmarried princess or imperial daughter, usually between seven and twelve years old. She underwent three years of purification in Kyoto, then travelled to Saikū where she would spend the remainder of her youth — sometimes her entire life — forbidden from returning to the capital, forbidden from marriage, her single purpose to embody the imperial line’s direct connection to the sun goddess.

Saikū was established during the reign of Emperor Tenmu in the late 7th century, formalizing a practice that may have originated even earlier. The complex occupied approximately 137 hectares near the Miya River, positioned between the capital and Ise Grand Shrine. From approximately 660 CE to 1185 CE, over sixty Saiō served here. The system ended abruptly during the Genpei War when the imperial court lost control of the region. The palace was abandoned, and eventually the location was forgotten entirely — rice fields covered the site for seven centuries. Archaeological excavations beginning in 1970 revealed the foundation stones, ceramics, and wooden tablets that confirmed this was indeed the lost Saikū. Today, the Saikū Historical Museum and reconstructed buildings mark the site, though no active shrine functions remain.

Saikū itself did not enshrine kami — it was a palace for the Saiō, not a shrine. The Saiō’s religious function was performed at Ise Jingū, specifically at the Naikū (Inner Shrine) where Amaterasu Ōmikami, the sun goddess and mythological ancestor of the imperial family, is enshrined. The Saiō served as the emperor’s ritual substitute, performing ceremonies at Ise that maintained the bond between the imperial throne and the divine. She was human vessel, not deity, but her body was treated as sacred — contact with death, blood, or Buddhist practices was forbidden, as these would compromise her ritual purity.

The most famous Saiō was Princess Ōku, daughter of Emperor Tenmu, who served from 673 to 686 CE. She was also a poet, and her verses in the Man’yōshū anthology remain the only direct testimony we have of a Saiō’s inner life. When her father died, she composed: “I shall not forget you, my lord, even in the life to come.” Another legend tells of the Saiō who broke her vows. In the mid-Heian period, a Saiō named Seishi fell in love with Taira no Kanemori, a guard assigned to the palace. Their affair was discovered, and she was immediately recalled to Kyoto in disgrace — the only recorded instance of a Saiō being removed for ritual pollution caused by romantic contact. The scandal appears in classical literature as a cautionary tale about desire contained and desire transgressed.

The excavated foundations reveal Saikū was laid out in a grid pattern resembling a miniature Heian capital. The main palace compound contained the Saiō’s residential quarters, administrative buildings, and ceremonial halls constructed in the shinden-zukuri style typical of aristocratic Heian architecture. One reconstructed building, based on archaeological evidence, shows cypress bark roofing and vermilion pillars. The Saikū Historical Museum displays artifacts recovered from the site: lacquerware, mirrors, wooden writing tablets (mokkan) recording daily supplies and rituals, and fragments of waka poetry scratched into pottery — evidence of educated women passing time in isolation. A reconstructed section of the eastern fence shows the boundary that separated the Saiō’s sacred precinct from the outside world.

• Saikū Festival (early June) — Annual event recreating the Heian period atmosphere with costumed processions, gagaku court music, and demonstrations of Saiō purification rituals performed by local participants in historical dress.
• Saiō Procession (October) — Reenactment of the Saiō’s journey from Kyoto to Saikū, with participants in ox-drawn carriages traveling traditional routes between temporary rest sites.

Early June during the Saikū Festival offers the most immersive experience, when the empty archaeological site temporarily fills with reconstruction of courtly life. Autumn (October-November) provides clear weather for walking the extensive grounds and understanding the spatial isolation the Saiō endured. The museum is uncrowded year-round — most visitors to Mie Prefecture go directly to Ise Grand Shrine, unaware that the site of the Saiō’s exile exists thirty minutes away by train.