Takada Domain
The area of present-day Myōkō was part of ancient Echigo Province. During the Edo period the area was divided between the holdings of Takada Domain and "tenryō" territory administered directly by the Tokugawa shogunate. With the creation of the modern municipalities system on June 26, 1890, the village of Arai was created within Nakakubiki District, Niigata. Arai was raised to town status on September 9, 1892 and to city status on November 1, 1954. The city of Myōkō was created on April 1, 2005, by the merger of the city of Arai with the town of Myōkōkōgen, and the village of Myōkō (both from Nakakubiki District).