A reverberatory furnace was preserved as it used to be on a hill and we dropped in at the site. The furnace had been researched by the Hagi clan. They couldn't accomplish the plan, but their motivation should be highly evaluated.
Japan had long adopted its restricted trade policy until the latter half of the 19th century. This was a contributing factor to about 250 years of the peaceful period. On the other hand, Japan's military power didn't develop due to the peaceful days. Japan didn't need to develop arms.
The condition had completely changed when several military ships showed up around Japan in the 19th century. People of integrity in this area collected various information from other countries and knew that Japan had been on the brink of being invaded. They started to research and develop the technology of casting and forging. Three furnaces of those people are preserved in Japan and I've visited one of them before(link). Viewing the incomplete furnace, I thought that I'd like to visit last one some day.
(Vocabulary)
reverberatory （炉が）反射式の
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