The furnace was built based on technical drawings found in the Dutch book 'Handleiding tot de Kennis der Artillerie'.
It was one of the few successful attempts in Japan to build a reverberatory furnace without direct foreign assistance.
The Choshu Domain commissioned this project following the arrival of Commodore Matthew Perry's Black Ships.
Despite the construction effort, the furnace was never fully operational for mass cannon production due to technical difficulties with raw material quality.
The bricks used in the structure were specially fired to withstand the extreme heat required for iron smelting.
The Hagi Reverberatory Furnace is a designated UNESCO World Heritage site representing Japan's late Edo-period industrialization. Constructed in 1856, this stone and brick structure was designed to melt iron for casting cannons to bolster coastal defenses against foreign naval threats. It stands as a rare surviving example of early Western-style metallurgical technology adapted in Japan. The remaining structure includes the tall brick chimney and the base of the furnace chamber. It was built under the direction of the Choshu Domain, which sought to modernize its military capabilities. The site is now part of the Sites of Japan’s Meiji Industrial Revolution cluster. Visitors can view the remnants from an observation area that provides context on the furnace's original configuration. The site remains preserved to demonstrate the rapid technological assimilation that occurred in 19th-century Japan.
The viewing platform facing the brick stack provides the best angle to capture the height and silhouette of the furnace.
Visit the onsite information center to see technical diagrams of how the furnace operated.
Combine your visit with the nearby Hagi City museum to better understand the domain's political history.
Use the provided educational signage to identify the original furnace footprint compared to later repairs.
Do not attempt to climb or touch the masonry, as the site is protected for historical preservation.
