Find Nirasaki Reverberatory Furnace!
Nirayama Reverberatory furnace is the hearth to melt metal and cast a cannon. Perry came by ship to Japan in 1853, and Japan was exposed to a foreign threat. Therefore the Tokugawa shogunate commands building of a reverberator for national defense. It's only here that the reverberator which worked exists. About 16 meters of 4 chimneys are left at present.