Kotohira Shrine Treasure Museum

Kotohira-gū Treasure House: A Meiji-Era Architectural Gem on the Sacred Steps of Konpira-san

Perched along the famous stone stairway of Kotohira-gū Shrine in Kagawa Prefecture, the Treasure House (Homotsu-kan) is far more than a repository of sacred artifacts. Built in 1905, this striking two-story granite building is itself a Registered Tangible Cultural Property of Japan, representing one of the nation's earliest purpose-built museum structures. Its remarkable fusion of traditional Japanese roofing with Western stone masonry techniques makes it an architectural landmark of the Meiji period, while the treasures within—including an Important Cultural Property statue and vivid Edo-period festival screens—offer visitors a rare window into centuries of devotion at one of Japan's most beloved shrines.

A Pioneering Museum Building: The Vision of Kuru Masamichi

The Treasure House was designed by Kuru Masamichi (1855–1914), a distinguished architect who served as a technical officer of the Ministry of Education. Kuru studied under Josiah Conder at the Imperial College of Engineering (now the Faculty of Engineering at the University of Tokyo) and went on to design numerous important public buildings across Japan, including schools, university facilities, and exhibition pavilions.

Among Kuru's most celebrated achievements was his design of the Japanese Pavilion (Hōō-den, or Phoenix Hall) for the 1893 World's Columbian Exposition in Chicago. This elegant structure is said to have made a profound impression on a young Frank Lloyd Wright, inspiring his lifelong appreciation for Japanese architectural aesthetics. When Kuru turned his attention to the Kotohira-gū Treasure House in 1905, he brought this same sensibility for blending Eastern and Western design traditions, working alongside fellow architects Ishihara Jōtarō and Akahori Tokujirō.

Originally known as "Kotohira-gū Museum No. 1," the building stands as one of Japan's earliest museum structures, comparable in historical significance to the Nara National Museum designed by Katayama Tōkuma in 1894.

Architectural Features: Where Japanese Tradition Meets Western Masonry

The Treasure House is constructed from Aoki-ishi, a type of granite quarried from Hiroshima Island in Kagawa Prefecture. This locally sourced stone gives the building its distinctive solidity and warm, natural coloring. Rising two stories with a total building area of 165 square meters, the structure displays a masterful synthesis of Japanese and Western architectural elements.

The roof follows the traditional irimoya-zukuri (hip-and-gable) style and is covered with tiles, while the entrance features an elegant karahafu-zukuri (cusped gable) porch clad in copper sheeting—a design motif commonly seen in Japanese castle and temple architecture. Yet alongside these traditional elements, the building incorporates distinctly Western features such as arched windows and carefully articulated stone joinery. This harmonious blending of styles exemplifies the wa-yō secchū (Japanese-Western hybrid) approach that characterized the most innovative architecture of the Meiji era.

The building was designated as a Registered Tangible Cultural Property on December 20, 1996, in recognition of its importance as an early example of a Japanese architect successfully integrating authentic Western construction techniques into a fundamentally Japanese architectural framework.

Treasures Within: Sacred Art Spanning Centuries

The collection housed within the Treasure House spans many centuries of artistic and religious heritage associated with Kotohira-gū Shrine.

Why Was It Designated a Cultural Property?

The Kotohira-gū Treasure House received its designation as a Registered Tangible Cultural Property for several compelling reasons. It stands as a pioneering work of Japanese-Western hybrid architecture, representing one of the earliest examples of a Japanese-trained architect incorporating genuine Western stone construction methods into a building with traditional Japanese roofing and entrance design. The use of locally quarried Aoki-ishi granite and the sophisticated integration of arched windows with irimoya and karahafu elements demonstrate an exceptionally high level of architectural ambition and skill for its era. As one of Japan's first purpose-built museum buildings, it also holds considerable significance in the history of cultural preservation and public education in Japan.

Visiting the Treasure House

The Treasure House is located along the stone stairway approach to Kotohira-gū's main shrine, at approximately the 400-step mark after passing through the Ōmon (Great Gate). This means visitors encounter it naturally during the pilgrimage up to the main hall, making it an ideal stop for a rest and cultural enrichment along the way.

The building itself is worth admiring from outside even before entering. Take a moment to appreciate the contrast between the heavy granite walls and the graceful curves of the karahafu entrance, and notice how the arched windows add a subtle European accent to the otherwise Japanese silhouette.

For those wishing to explore all of Kotohira-gū's museum facilities, a combined ticket covering the Treasure House, the Omote Shoin (a study hall with Important Cultural Property sliding-door paintings by Maruyama Ōkyo), and the Takahashi Yūichi Museum (dedicated to a pioneer of Western-style oil painting in Japan) offers excellent value.

Surrounding Attractions

Kotohira-gū Shrine itself is one of Japan's most iconic pilgrimage destinations, with 785 stone steps leading to the main hall and a further 583 to the inner shrine atop Mount Zōzu. Along the approach, visitors pass the Omote Shoin with its magnificent Maruyama Ōkyo paintings, the imposing Asahi-sha pavilion (also an Important Cultural Property), and the charming statue of the Konpira Dog—a tribute to the Edo-period tradition of dogs making the pilgrimage on behalf of their owners.

In the town below, the Former Konpira Grand Theater (Kanamaruza), a beautifully restored Edo-period kabuki theater, offers performances during its spring festival. The area is also famous for Sanuki udon noodles, and numerous restaurants along the approach serve this beloved local specialty. The historic Sayabashi Bridge, a Registered Tangible Cultural Property with its distinctive arched wooden structure and copper roof, crosses the Kanakura River near the shrine entrance.

Kagawa Prefecture's other attractions are easily accessible, including Ritsurin Garden in Takamatsu, the art islands of Naoshima and Teshima, and the scenic views across the Seto Inland Sea.