Rikyū-in (離宮院跡)

Rikyū-in exists now only as foundations and earthworks in a residential neighborhood of Ise, but for three centuries it was the mandatory residence where imperial princesses lived before assuming their duties at Ise Grand Shrine. The site was a palace of preparation and purification — a threshold between the imperial court and the holiest shrine in Japan. Here, unmarried daughters of emperors underwent years of ritual training before becoming saiō, the high priestesses who would serve Amaterasu herself. The last saiō left in 1333; the buildings burned or decayed; but the rectangular precinct remains, marked by stone monuments and the memory of sequestered royalty.

Rikyū-in was established in the early Heian period as the formal residence for saiō — imperial princesses selected to serve as high priestesses at Ise Grand Shrine. The system began in the 7th century, but the permanent palace structure at this location was constructed around 889 CE during Emperor Uda’s reign. Each selected princess, usually between seven and fifteen years old, would live here for the duration of her service, which could last decades. The residence was maintained by a staff of court officials, ladies-in-waiting, and ritual specialists. The saiō system continued through the Kamakura period, ending with the chaos of the Nanboku-chō civil wars in 1333. After the last priestess departed, the buildings gradually fell into ruin. Archaeological excavations beginning in 1970 revealed the palace’s foundations, gardens, and well sites, confirming historical records of its scale and layout.

Rikyū-in was not itself a shrine but a sacred residence connected institutionally to Amaterasu Ōmikami, the sun goddess enshrined at Ise Grand Shrine. The saiō who lived here served as Amaterasu’s earthly representative and intermediary. Though no kami were enshrined at Rikyū-in, the site functioned as an extension of Ise’s ritual authority. The princess performed daily purifications and received instruction in Shinto liturgy, poetry composition, and court protocol. She was forbidden to see her family or eat meat, and her life was governed by the lunar calendar and agricultural festivals. Upon completing her service — either through the death of the emperor who appointed her or her own retirement — she would return to Kyoto, often unable to marry due to her age and sacred status.

The most enduring legend of Rikyū-in concerns the saiō who became the poet Senshū Naishi-no-kami in the late 9th century. Appointed at age fourteen, she served for over twenty years in near-total isolation. Court records describe her composing poetry at night by lamplight, inscribing verses on sliding screens that have since been lost. One autumn, a traveling musician played flute outside the palace walls, forbidden from entering. She wrote a poem comparing his music to migratory birds — beautiful precisely because it could not stay. The story became emblematic of saiō loneliness: women living in palace luxury but experiencing profound social death. Another tradition holds that the grounds’ well water never freezes, even in winter, because the saiō tears that fell into it over centuries carry residual warmth from royal sorrow.

Nothing remains standing at Rikyū-in, but excavations have revealed the palace’s 120-meter by 90-meter rectangular precinct, surrounded by earthen walls and a moat. The main residence occupied the northern section in the formal shinden-zukuri style of Heian aristocratic architecture — a central hall with wings connected by covered corridors. Gardens with ornamental ponds and planted pines filled the southern grounds. Stone-lined wells provided water for daily purifications. The site is now an open grassy field with explanatory signboards and foundation markers. A small monument erected in 1970 commemorates the saiō system. Cherry trees have been planted around the perimeter. The Saikū Historical Museum, located 500 meters away, displays artifacts excavated from the site including roof tiles, ceramics, wooden tablets (mokkan) inscribed with administrative records, and fragments of lacquerware that suggest the residents’ refined lifestyle.

• Saikū Festival (June) — Annual historical reenactment held at the site featuring costumed participants portraying a saiō procession, Heian court music, and poetry recitations.
• Cherry Blossom Viewing (Early April) — The site’s modern cherry trees draw local visitors for hanami, though no historical records indicate cherry trees existed during the palace’s active period.

June during the Saikū Festival, when the site briefly recovers a suggestion of its former ceremonial life. The historical reenactment is modest but carefully researched, and local historians often give informal talks. Otherwise, late autumn or early spring when fewer tourists visit Ise city and the ruins can be experienced in the quiet they’ve known for seven centuries. The site takes fifteen minutes to walk around; the adjacent museum requires an hour.