Ohashi blast furnace mark
Sabiuchi reservoir where the iron mountain sleeps in the lake bottom
The birth of modern steelmaking
The mountainous area between Kamaishi on the Sanriku Coast and Tono on the Kitakami Highlands is an area blessed with high quality iron ore, with 1000m class high peaks such as Hexagonal Mt, Mt. is. Morioka samurai- Takato Oshima (Takato Oshima) by Japan's first Western-style blast furnace, using these iron ore, rich in forest resources as a fuel, the water flow that serves as a power source of the blower, first 1857 years ( Otsuchi through Koshi villenage in 1857) (Bridge blast furnace upstream of the Kasshigawa flowing through the current of Kamaishi), but the following year to Aonoki district of upstream Aonoki River, a tributary of Hashino River, which flows through the Kamaishi, Kuribayashi village Hashino A blast furnace (country designated historic site) was built. Thus, the total number of Ohashi 3, Hashino 3, Sabinai (Tono city Kamigo-cho) 2, Kuribayashi (Kamaishi city) 1, and Shikodo (Kakoishi city Koshi-cho) 1 up to the Keio first year (1865) in Morioka Shonai Ten blast furnaces were constructed, and annual production of one million straight (3,750 tons) pig iron is planned.
Around this time the Samurai movement was intensifying, Zhuge was trying to cast a cannon for a maritime protection. However, the traditional iron making process is based on sand iron and charcoal as a raw material and is a traditional Japanese iron refining method that is carried out using a large scale (Tatara = a large bellows that blows air with foot). Because iron is hard, it is not suitable for cracking for high performance weapons such as cannons. Oshima focused on the iron ore rich in Kamaishi, produced soft iron (slag iron refined from iron ore) using a reflection furnace (blast furnace), and laid the foundation for the modernization of the iron industry in Japan.