* Image is for illustrative purposes only.Ōzu Castle
大洲城
Ōzu Castle is a historic castle in Shikoku dating from the Built circa 1331 (Genkō 1), whose lord was Katō Sadayasu.
Overview
About the Castle
Ōzu Castle stands on a hill beside the Hijikawa River in Ōzu, Ehime Prefecture, a yamashiro (hilltop castle) known as "the Little Kyoto of Iyo," guarding the town of Ōzu as one of Shikoku's foremost castles. It originated around 1331 when Utsunomiya Toyofusa built a fortification, was governed by Tōdō Takatori during the Sengoku period, passed through Wakizaka Yasuharu, and in 1617 (Genna 3) Katō Sadayasu became the daimyo, whose son Katō Yasaoki consolidated the Ōzu domain (60,000 koku), after which the Katō clan ruled until the Bakumatsu period. The four-story tenshu was dismantled in 1888 (Meiji 21) due to deterioration but was fully reconstructed in wood in 2004 (Heisei 16) based on detailed historical records—Edo-period photographs, architectural models (hinagata), and design blueprints (mokuwari-sho). This restoration stands as the most precise example of castle reconstruction in Japanese castle-restoration history and has received high acclaim both domestically and internationally.
The Hijikawa Mist and Sky Castle
Inseparable from Ōzu Castle's beauty is the fantastical landscape of the "Hijikawa mist" and the "sky castle." From autumn through winter, dense fog rising from the Hijikawa envelops the Ōzu basin at dawn, and the wooden tenshu rises above the mist in the spectacular "Sky Castle." This sight has recently gained nationwide fame as a photogenic spectacle on social media, drawing photography enthusiasts to gather at dawn to photograph the misty castle. At night, the tenshu is illuminated, and the sight of the illuminated castle reflected in the Hijikawa is particularly beautiful.
The Triumph of Full-Timber Reconstruction
The wooden reconstruction of Ōzu Castle's tenshu, completed in 2004, was a watershed moment in Japanese castle reconstruction history. The fortuitous availability of three precise sources—photographs taken before dismantling in 1888 (Meiji 21), Edo-period architectural models (hinagata), and detailed design blueprints (mokuwari-sho)—made faithful high-fidelity restoration possible. The restoration involved master carpenters from the locality and traditional builders nationwide, recreating Edo-period construction methods and materials as closely as possible. The completed tenshu stands as Shikoku's sole fully wooden reconstructed tenshu and receives high scholarly acclaim from castle-architecture and traditional-building perspectives.
Ōzu Castle-Town Culture
Ōzu preserves the historic streetscape called "the Little Kyoto of Iyo," retaining samurai residences, merchant houses, and historic structures including the former Garyu-Sanso (Garyu-in). Built in the Meiji era, Garyu-Sanso comprises three buildings—Garyu-in, Furō-an, and Chishi-an—situated on cliffs overlooking the Hijikawa, designated Important Cultural Property. Notably, Furō-an is an exquisite sukiya-style tea pavilion projecting over the river; the tea ceremony experience amid autumn foliage, river mist, and moonlight embodies the pinnacle of Japanese aesthetic sensibility. Ōzu's culinary culture is famous for ayu (sweetfish) salt-grilled and imotaki (taro-and-vegetable stew); wild ayu from the pristine Hijikawa waters are prized throughout Japan as a distinctive Ōzu delicacy.
The Katō Clan and Ōzu Domain Culture
The Katō clan of Ōzu domain produced daimyo for ten generations from founding lord Katō Yasaoki through the Bakumatsu period. The clan promoted martial arts and scholarship; the domain academy Shizendō emphasized practical learning. In the late Edo period, Ōzu domain participated in the anti-bakufu movement, with loyalist factions actively involved within the domain. Armor, swords, and documents associated with the Katō family are preserved in Ōzu Castle tenshu and the Ōzu Municipal Museum, illustrating provincial samurai culture under a local daimyo in Iyo.
Connection to Swords
Ōzu Castle's connection to swords can be understood through three dimensions: Tōdō Takatori and the Katō clan who were involved in its construction, and Iyo's sword-smithing culture. Tōdō Takatori, who played a significant role in the development of Ōzu Castle, was known as a "master of castle-building" and possessed excellent discernment as both a sword collector and connoisseur. Takatori received renowned blades from Tokugawa Ieyasu and assembled swords from battlefields across Japan; his keen eye for quality was held in high regard among the daimyo. The Katō clan, who became lords of Ōzu domain, devoted themselves throughout the Edo period to encouraging martial arts among their retainers, inviting swordmasters from the domain academy to conduct instruction in sword practice. The Katō collection of swords includes blades that successive lords collected and enshrined, as well as swords granted to retainers as recognition for their battlefield exploits; some of these are preserved and displayed in the Ōzu Castle tenshu exhibition room and the Ōzu Municipal Museum. Iyo (Ehime Prefecture) is a region that left its mark in sword-smithing history as a center for Iyo blades, though records concerning Iyo swordsmiths from the classical period are sparse, and its true character has not yet been fully elucidated. The Hijikawa River near Ōzu may have functioned as a source of water necessary for smithing—particularly for quenching—and is thought to have played a role in the sword-craft culture of the castle town. Sword enthusiasts who visit the wooden reconstructed tenshu of Ōzu Castle can enjoy the displays of armor and sword mountings in the tower while experiencing the depth of Shikoku's warrior culture through the Katō clan and Iyo's sword-smithing heritage. Combined with tea ceremony experiences at Garyu-Sanso, this becomes a luxurious journey where one can experience the very essence of Japanese warrior culture, where the beauty of the sword and the beauty of tea resonate together.
Highlights
- Fully wooden reconstructed tenshu — Shikoku's sole timber-reconstructed tenshu, faithfully restored from Edo-period blueprints, models, and historical photographs.
- Hijikawa mist and 'Sky Castle' — Early mornings in autumn and winter, the tenshu floats above mist in a spectacle among Japan's finest scenic views. Ideal for social media.
- Garyu-Sanso (Important Cultural Property) — Exquisite sukiya architecture perched on cliffs above the Hijikawa. Tea ceremony in Furō-an becomes a lifetime memory.
- Historic Ōzu streetscape — Wander the castle-town samurai residences and merchant houses of 'the Little Kyoto of Iyo.'
- Native Hijikawa ayu and imotaki — Ōzu's two signature dishes. Salt-grilled sweetfish from pristine waters and autumn taro-stew are exquisite.
- Hijikawa Line boat tour — Float down the river while enjoying Ōzu Castle and natural scenery from the water.
* Opening hours and admission fees are subject to change. Please check the official website before visiting.