Tsukubusuma Shrine — 都久夫須麻神社

Tsukubusuma Shrine sits on Chikubu Island, a volcanic outcrop barely 600 meters in circumference, rising from the northern waters of Lake Biwa. To reach it requires a ten-minute ferry crossing from the mainland—no one lives on the island permanently, and never has. The shrine’s main hall, built in 1602, is a National Treasure constructed entirely without nails, its cypress wood darkened by four centuries of lake wind. The island is so small that the shrine, a Buddhist temple, and a forest of ancient cedar and pine occupy almost its entirety. When pilgrims depart, the island returns to silence and the resident population of wild monkeys.

The shrine was established in the 6th century, making it one of the oldest Shinto sites on Lake Biwa. The island’s position in the northern lake made it a strategic spiritual site—an island shrine served as protection for travelers and fishermen navigating Japan’s largest freshwater body. During the Heian period, the shrine became a popular pilgrimage destination for aristocrats traveling from Kyoto. The current main hall, the Honden, was reconstructed by Toyotomi Hideyori in 1602 and represents the only surviving example of its particular architectural style from the Momoyama period. The shrine has coexisted with Hōgonji Temple on the same island since the 8th century, a perfect example of shinbutsu-shūgō (the syncretic blending of Shinto and Buddhism) that survived even Meiji-era separation edicts.

Ichikishimahime no Mikoto is the primary deity, one of three Munakata goddesses born from the ritual purification of Susanoo and Amaterasu. She is a water deity and goddess of wealth, beauty, and eloquence. Her association with islands and maritime safety made Chikubu Island—isolated in the center of a lake crucial for medieval commerce—an ideal site for her worship. Pilgrims often identify her with the Buddhist deity Benzaiten, and the island shrine serves both traditions. Her messenger animals are white serpents, considered sacred on the island. The shrine also enshrines Ukano Mitama no Mikoto, the grain deity, and Sugawara no Michizane, the scholar-god, though Ichikishimahime remains the focus of the island’s spiritual power.

The island’s founding legend involves a dragon. According to the Chikubushima Engi, the goddess Ichikishimahime descended to the island riding on the back of a great dragon that emerged from Lake Biwa’s depths. The dragon coiled its body around the island three times before diving back into the water, leaving the goddess on the shore. This is why the island is considered sacred ground—dragon-sanctified earth. A second legend holds that throwing a small clay roof tile (kawarake) from the shrine’s lakeside stage and making it land on a torii gate standing in the water will grant your wish. The tiles are sold at the shrine specifically for this purpose, and the lakeshore around the torii is littered with centuries of failed attempts. Successful throws are said to ensure safe passage across water and protection from drowning.

The Honden (main hall) is designated a National Treasure and exemplifies late Momoyama-period architecture with its layered hip-and-gable roof and intricate bracket systems. The structure’s resilience comes from its joint-based construction—no nails—allowing the building to flex during earthquakes. The Haiden (worship hall) connects to the Honden via a covered corridor and features elaborately painted ceiling panels depicting flowers and mythological creatures. Most dramatic is the Bentendo, a vermillion stage built out over the lake on wooden pillars, offering panoramic views of the water and mountains. The island’s stone stairway, lined with lanterns, ascends sharply through dense forest from the ferry landing to the shrine complex. Ancient cedar trees, some over 600 years old, form a canopy over the path, and stone markers commemorate Edo-period pilgrims who made the journey.

• Senzai Festival (June 10) — The island’s main festival features ritual dances performed by shrine maidens on the lakeside stage, accompanied by drums and flutes. Decorated boats circle the island carrying offerings.
• Kawarake Throwing Ritual (Year-round) — Pilgrims purchase clay tiles inscribed with wishes and attempt to throw them through the torii gate standing in the lake. Successful throws are rare but considered highly auspicious.
• New Year Hatsumode — Special ferries run continuously from December 31 through January 3, bringing thousands of visitors who pray for maritime safety and prosperity in the new year.

Early morning in late autumn. The lake mists are thickest in November, often obscuring the island completely from shore until the sun burns through around 9 AM. Cherry blossoms bloom in early April, and the island’s limited space makes the effect concentrated and overwhelming. Avoid weekends during cherry blossom season—the ferries become uncomfortably crowded and the island loses its characteristic solitude. Winter visits offer the island at its quietest, though ferry schedules are reduced and temple buildings may be closed. The shrine itself remains accessible year-round.