Tatara (Traditional Iron Smelting)

Tatara is the traditional Japanese method of smelting iron and steel, practiced for over a thousand years primarily in the San'in region (Shimane and Tottori prefectures). The process uses iron sand (satetsu) collected from riverbeds and mountain soil, combined with charcoal in a clay furnace that is kept at temperature by large bellows.

The tatara process produces tamahagane, a type of high-carbon steel prized for Japanese sword-making. A single tatara operation (one 'campaign') requires three days and three nights of continuous work, consuming vast quantities of charcoal and iron sand. The resulting steel bloom (kera) is broken apart and sorted by carbon content.

Tatara is deeply connected to Shinto mythology. The Yamata no Orochi legend, in which Susanoo slays an eight-headed serpent and discovers a sword in its tail, is widely interpreted as a mythologized account of iron-working culture in the Izumo region. The Kanayago shrines, dedicated to the patron deity of tatara, number over 1,200 across Japan, with their head shrine in Yasugi, Shimane.