Iris Colony in Saigū

Saiku no Hanashobu Gunraku: A Wild Iris Colony Whispering of the Sacred Princesses of Ancient Japan

Tucked into the gentle plains of Meiwa Town in Mie Prefecture, a modest patch of marshland erupts each early summer into a sea of deep violet blossoms. This is the Saiku no Hanashobu Gunraku—a wild colony of Japanese irises that has bloomed in this very spot since long before the Edo period, when pilgrims to the Grand Shrines of Ise paused along their journey to admire its quiet beauty. Designated as a Natural Monument by the national government in 1936, this small but storied wildflower habitat is one of the last surviving remnants of the great wetlands that once spread across this part of Japan. For visitors seeking an intimate encounter with seasonal Japanese beauty—and with a landscape steeped in the legends of imperial princesses—this is an unforgettable destination.

The Land of the Saio: Historical Background

The town of Meiwa, where this iris colony grows, is no ordinary rural community. From the Asuka period through the Nanboku-cho period—a span of roughly 660 years—this area was home to the Saiku, the palace and government complex of the Saio, an unmarried imperial princess sent from the capital to serve the supreme goddess Amaterasu at the Grand Shrines of Ise. Around sixty Saio in total were chosen to live here, each accompanied by hundreds of attendants and officials, transforming this remote corner of Ise Province into one of ancient Japan's most refined cultural centers, sometimes called the "Bamboo Capital."

The wetlands surrounding the Saiku were rich with native wildflowers, and the wild iris (nohanashobu) became one of the symbols of the region. Travelers on the ancient Ise road, then later pilgrims of the Edo period, were so struck by the colony that records and illustrations of these flowers appeared in classical guidebooks and pilgrimage maps. The locals affectionately called them "donto-bana," a vernacular nickname that has survived to this day.

Why Was It Designated a Natural Monument?

By the Meiji period, agricultural development and land reclamation were rapidly destroying the wetlands of the Ise plain, and with them, the wild iris habitat that had endured for centuries. Concerned villagers, recognizing the historical and botanical significance of what remained, drew up a community covenant in 1893 to protect a portion of the colony from further loss—a remarkably early example of grassroots heritage conservation in Japan.

In June 1936, the eminent botanist Manabu Miyoshi visited the site to conduct a formal survey. He cross-referenced the living plants with classical texts and old illustrated maps, concluding that the wetland and its iris colony had existed continuously from antiquity. Warning that "this primeval marsh is in danger of disappearing and must be preserved as a Natural Monument," he recommended immediate designation. Just six months later, on December 16, 1936, the site was officially designated a National Natural Monument under the name "Saiku Village Iris Colony."

The botanical interest is significant in its own right. Despite the official name using the term "hanashobu" (the cultivated Japanese iris seen in garden ponds around the world), the plants growing here are in fact nohanashobu (Iris ensata var. spontanea)—the wild ancestor of the cultivated variety. These wild irises are slightly smaller and more delicate than their garden cousins, and surviving wild colonies on flat plains are extremely rare in Japan.

Highlights and Experiences

A Sea of Violet in Early Summer

The peak bloom typically arrives between late May and early to mid-June, when approximately 3,000 wild iris plants open their deep purple-violet flowers. Unlike the showy, multi-colored cultivars in landscaped iris gardens, these wild blossoms have an understated, almost melancholic elegance—perfectly in keeping with the spirit of the place. The flowers last only about a week at peak, so timing your visit carefully is rewarded.

A Living Conservation Story

What you see today is not simply an untouched relic. After decades of decline, dedicated conservation efforts by the town of Meiwa, local residents, and botanists have brought the colony back from the brink. A groundwater pumping station now supplies the wetland from April through June, and surrounding fields have been converted into experimental propagation plots. The result is one of the most successful community-led natural heritage restorations in Japan—a place where you witness not only ancient beauty but also a living dialogue between people and nature.

The Saiku Ruins and Historical Romance Plaza

Within easy walking distance, the Saiku Ato Rekishi Roman Hiroba (Saiku Historical Romance Plaza) also features extensive plantings of wild iris alongside reconstructed Heian-period buildings, making the entire area a gentle, photogenic stroll during iris season.

Visitor Information

The site is located in the Hinoso district of Meiwa Town, surrounded by rice paddies on the east bank of the Sasabue River. From Saiku Station on the Kintetsu Yamada Line, the colony is roughly a 30-minute walk; from Meisei Station, also on the Kintetsu Yamada Line, the distance is similar. By car, the site is about 15 minutes from Saiku Station and roughly 30 minutes from the Tamaki Interchange on the Ise Expressway.

There is no admission fee. The colony is a designated Natural Monument and is enclosed for protection, so visitors view the irises from the perimeter pathways—please refrain from entering the protected area or picking flowers. Visiting in the morning offers the best light for photography and the freshest blossoms.

Surrounding Attractions

Meiwa Town offers an exceptional concentration of cultural and historical sites that can be combined with a visit to the iris colony:

• Saiku Historical Museum (Saiku Rekishi Hakubutsukan)—a prefectural museum offering detailed exhibits on the Saio system, with film screenings, recovered artifacts, and reconstructions.
• Itsukinomiya Historical Experience Hall—where visitors can try on Heian-period costumes (junihitoe layered robes) and experience aristocratic pastimes such as kai-awase shell matching.
• Saiku Heian no Mori—full-scale reconstructions of Heian-period administrative buildings on their original archaeological foundations.
• Take Shrine—a beautiful shrine on the site believed to be the inner residence of the Saio during the Heian period, known for its seasonal floral hand-water basins (hanachozu).
• Saio Matsuri—an annual festival in early June recreating the five-night journey of the Saio from Kyoto to Ise, drawing 30,000 visitors and featuring elaborate Heian-period costume processions.
• Ise Jingu—the most sacred Shinto shrines in Japan, located about 15 kilometers away, naturally complementing any visit to the former territory of the Saio.