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Kiyosu-City Kiyosu Castle
Kiyosu Castle, Once the Greatest Castle on Earth
One of the more important and historically significant castles in Japan's Sengoku, or Warring States period, was Kiyosu Castle, built between 1394 and 1427 as a major strategic defense, and later the seat of power for the Owari (western Aichi) region. Local warlord and hero, Oda Nobunaga, first of the Three Unifiers of Japan, captured the castle in 1555 and used it as his base for many years. During that time, Kiyosu grew to be one of the more vibrant cities, spurred on by Nobunaga's economic reforms and heightened security.