The area of Yasugi was the center of ancient
Izumo, which was a powerful kingdom during the
Yayoi and
Kofun period. According to legend, the goddess
Izanami was buried here. The port at Yasugi on the Nakaumi was a center for trade with the
Korean Peninsula from ancient times. Due to plentiful supplies of
iron sand and timber, ancient
tatara steelmaking flourished and was a source of economic strength. The Yasugi Steel brand name bears the name of the city, and was established by
Hitachi Metals, Ltd. During the
Sengoku Period,
Gassantoda Castle was the stronghold of the
Amago clan, and under the
Edo Period Tokugawa shogunate, the area was ruled by
Matsue Domain. After the
Meiji restoration, the town of Yasugi was established on April 1, 1889, with the creation of the modern municipalities system. The city was founded on April 1, 1954, by the merger of Yasugi with the villages of Iinashi, Arashima, Akae, Shimada, and Otsuka. On October 1, 2004, the towns of
Hakuta and
Hirose (both from
Nogi District) were merged into Yasugi. ==Government==