The Palace and Buddhist Altar in the Main Hall of Fukujoji

A Golden Shrine from the Age of Civil War: Discovering the Kūden and Butsudan of Sumadera Temple

Tucked away in the quiet Suma district of Kobe stands a temple that has heard the echoes of one of Japan's most storied battles. Sumadera—officially known as Fukushō-ji—guards within its main hall an extraordinary treasure that most visitors walk past without realizing its rarity. Inside the inner sanctuary sits a miniature wooden palace of startling delicacy, set upon a tiered altar that blends two competing architectural philosophies of medieval Japan. This is the Kūden (inner shrine) and Butsudan (altar) of Fukushō-ji, designated an Important Cultural Property of Japan, and crafted in the year 1368, when the archipelago was torn between rival imperial courts.

What Is a Kūden?

The word kūden—written with the characters for "palace" and "hall"—refers to an ornate miniature architectural shrine placed inside a Buddhist main hall to enshrine the principal image of worship. Think of it as a temple within a temple: a small but fully realized wooden building, complete with rafters, brackets, and a tiled or shingled roof, crafted at reduced scale so that the sacred icon may rest within a structure of suitable dignity.

At Sumadera, the Kūden sits upon an elevated altar, the Butsudan, which itself has been designated together with the shrine as a single important cultural property. The whole arrangement—altar plus miniature palace—was completed in Ōan 1 (1368), during the Northern and Southern Courts period, and according to the temple's own historical chronicle Tōzan Rekidai, the patron responsible for its creation was a figure named Shikibu Hokkyō Chōken.

A Rare Fusion of Two Architectural Styles

What makes this ensemble so significant is not simply its age but its unusual design. Medieval Japanese temple architecture was dominated by two major imported styles: the karayō (Chinese style, associated with Zen temples and characterized by dense, elaborate bracketing) and the wayō (native Japanese style, softer and more restrained). Most buildings committed themselves to one style or the other.

The Fukushō-ji altar, however, unabashedly combines both. The lower tier of the two-level Butsudan is built in the karayō manner, while the upper tier adopts the wayō manner. Above this two-tiered base rises a further plinth, and atop that plinth stands the Kūden itself—a three-bay miniature hall whose bracketing is the triple-stepped mitesaki of the Chinese style. The front eaves carry a karahafu, the distinctive undulating cusped gable familiar from castle gates and shrine entrances, though this particular element is a later restoration.

Architectural historians treat this blended composition as unusual even within the already varied world of medieval eclectic style, and it provides one of the clearest surviving examples of how craftsmen of the fourteenth century experimented with mixing the two traditions in a single, coherent object.

Why It Was Designated an Important Cultural Property

The Kūden and Butsudan were designated an Important Cultural Property of Japan on August 29, 1953. Three factors underpin this designation.

First is dating certainty. The temple's own internal chronicle records the year of construction and the name of the patron, giving scholars a firm anchor in the fourteenth century. Objects of this age often lack such documentation.

Second is stylistic significance. The deliberate layering of Chinese-style and Japanese-style elements in a single structure makes the altar a rare textbook example of early Muromachi eclecticism.

Third is craftsmanship. The three-bay miniature palace, with its finely articulated bracketing and delicate proportions, preserves the sensibility of high-end medieval temple joinery in a form that has survived the centuries largely intact thanks to its protected location within the main hall.

Survivor of Fire, War, and Earthquake

The main hall that currently shelters the Kūden was rebuilt in 1602 by Toyotomi Hideyori, son of the warlord Hideyoshi, with the renowned commissioner Katagiri Katsumoto overseeing construction. That the inner shrine predates its outer hall by more than two centuries is itself remarkable—it means the Kūden was carefully preserved through the fires, floods, and earthquakes that repeatedly destroyed and rebuilt the buildings around it.

In 1972, under the guidance of the Agency for Cultural Affairs, the Kūden and altar underwent a complete dismantling and restoration, returning them as closely as possible to their appearance of roughly six centuries earlier. When the Great Hanshin-Awaji Earthquake struck in 1995, the ensemble endured further stress, and another round of restoration work was carried out in 2005 to return it to its current condition.

Visiting Sumadera: What to See

Sumadera—formally the head temple Fukushō-ji of the Sumadera branch of Shingon Buddhism—is famous well beyond the Kūden. The temple occupies a prominent place in Japanese literary and martial history, and its compound is a compact pilgrimage through the cultural memory of the country.

The Main Hall (Hondō)

The current main hall, rebuilt in 1602, is where the Kūden is enshrined. The principal image is a seated Sacred Avalokiteśvara (Shō-Kannon), flanked by Bishamonten and the wrathful Acala (Fudō Myōō). Visitors may approach the interior through the outer worship area during daytime hours.

Genpei Garden (Genpei no Niwa)

Near the entrance, bronze statues stage the most poignant scene of the 1184 Battle of Ichi-no-Tani: the young Taira nobleman Atsumori, just fifteen years old, turning his horse to face the older Minamoto warrior Kumagai Naozane. The encounter ended in Atsumori's death and left Naozane so shaken by remorse that, the tale says, he eventually took Buddhist vows.

The Aoba no Fue Flute

The temple's treasure house preserves the "Aoba no Fue," a bamboo flute said to have been Atsumori's beloved instrument, found on his body after the battle. A second flute, the thinner "Komabue," is also kept here. Admission to the treasure house is free.

Atsumori's Head-Mound and the Shrine Grounds

Elsewhere in the compound visitors will find the small grave-mound honoring Atsumori's head, the "Yoshitsune Pine" commemorating the Minamoto commander Yoshitsune, and the "Benkei Bell" associated with the legendary warrior-monk.

Around the Temple: Places to Pair with Your Visit

Sumadera sits in a district rich with attractions that complement the temple visit. Within a short walk lies the Suma Rikyū Park, an 82-hectare landscape garden built on the site of a former imperial villa, famous for its European-style fountain garden and rose beds that bloom from spring through autumn. A little further south, the coast offers the beach at Suma and the recently opened Kobe Suma Sea World, a major marine resort and aquarium built on the site of the former municipal aquarium. For those tracing the footsteps of the Genpei warriors, the former battlefield of Ichi-no-Tani and the great stone pagoda of Atsumori-zuka (near Sumaurakōen Station) lie just a short train ride to the west.