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Date Masamune was a Japanese samurai of the Azuchi-Momoyama period through early Edo period. Heir to a long line of powerful daimyo in the Tōhoku region, he went on to found the modern-day city of Sendai. An outstanding tactician, he was made all the more iconic for his missing eye, and Masamune was often called dokuganryu , or the "one-eyed dragon".

Source from Wikipeida