It was built by Toyotomi Hideyoshi, who called it "Iru Tang." A local museum still has a screen depicting the scene at the time. In less than six months, the castle, second only to Osaka at the time, was built, and 160 of Japan's most famous military commanders were assembled. The one who led the largest number of troops was Tokugawa Ieyasu, with 15,000 soldiers, and at its peak, over 200,000 soldiers came and went. It surpassed Kyoto. There was a golden teahouse.