There are theories that reality of the legend of Shibaemon-tanuki is that it was an excuse for the Kougo Jihen, a struggle that broke out between Sumoto and Awa, or that it was a Dutch person who washed ashore to Japan and hid himself in a castle, and was thought of by the people beneath the castle, who have never seen foreigners before, as a tanuki who disguised as a human, among other theories.