黒船来航
In response to the Perry Expedition and increasing incursions of foreign warships into Japanese territorial waters, several modern sailing frigates, including "Shōhei Maru" and "Asahi Maru", were constructed on orders of the Tokugawa shogunate of Bakumatsu period Japan by Satsuma Domain. "Shōhei Maru" was built from 1853 to 1854 at Sakurajima in what is now Kagoshima Prefecture in accordance with a Dutch blueprint. Furthermore, fortifications were established at Odaiba in Tokyo Bay in order to protect Edo from an American incursion. Industrial developments were also soon started in order to build modern cannons. A reverbatory furnace was established by Egawa Hidetatsu in Nirayama to cast cannons.