Guida
The Nirayama Reverberatory Furnace is an industrial heritage site that symbolizes the technological innovation of the late Edo period. A reverberatory furnace is a facility designed to melt iron ore to produce high-quality iron. This site is particularly significant as it is the only one of its kind in Japan that actually functioned, earning it a place as a UNESCO World Heritage site. The structure, including the chimney, reaches a height of approximately 15.7 meters, serving as a vital piece of evidence of Japan's technological capabilities during the late 19th century.
Following the arrival of Commodore Perry in 1853, construction was accelerated to bolster the defense of Edo Bay. Although the project was initially planned for a location near Shimoda, it was moved to its current location in Izunokuni due to strategic considerations involving the movement of the Perry fleet. The construction was led by the local magistrate, Hidari Ebara, and the subsequent technical processes were managed by his son, Toshitoshi. The design utilizes a dual-furnace system with two melting chambers arranged perpendicularly, based on Dutch technical documents. After its completion in 1857, it served as a Shogunate-operated facility until 1864, used for casting Western-style cannons.
The primary focus is the structure of the existing furnace itself. Visitors can observe the mechanism used to achieve high temperatures by reflecting heat off the dome-shaped ceiling, as well as the structure of the melting chambers. Archaeological excavations have also uncovered artifacts such as cannon molds, providing a glimpse into the daily operations of the time. The surrounding area includes the remains of workshops and warehouses where craftsmen once worked, allowing visitors to grasp the scale of the industrial operations during that era.
The facility is open year-round, but closing times vary by season. From April to September, it remains open until 17:00, and from October to March, it closes at 16:30. Visiting in the spring allows you to enjoy the historical ruins alongside the beautiful seasonal scenery. Daytime visits are highly recommended to clearly observe the intricate furnace structure, the height of the chimney, and the surrounding workshop ruins.
Through these existing ruins, you can experience the process of how engineers during the late Edo period melted iron and cast cannons. The exhibits and structures provide a visual understanding of the advanced technical skills and the momentum toward Japan's modernization. It is a unique opportunity to touch upon the history of industrial systems within a beautiful natural landscape.
Near the Nirayama Reverberatory Furnace, you can find various historical buildings and cultural heritage sites. The area features several landmarks that showcase Edo-period architectural styles and are related to the local lifestyle and industry. You can easily incorporate these into a historical walking route through the rich natural environment of Izunokuni.
Since the visit primarily involves walking outdoors and observing historical ruins, comfortable walking shoes and practical clothing are highly recommended. Please check local conditions for specific payment details or guidance. To protect the historical site, please refrain from entering restricted areas or touching the structures. We also ask for your cooperation in respecting the environment and other visitors.