Katsuo-ji Temple is one of the oldest temple located in Mino, Osaka Pref. It was established in 765 by Priest Zenchu and Zensan. Buddhist Monk Myokan carved the sacred Kannon Statue as the main script. He finished making the statue in August 18, therefore every 18th of a month becomes the Kannon's day. 6th Priest of this temple, Priest Gyojun healed the Emperor Seiwa from his sickness.
After his recovery, the Emperor granted the priest the use of the name of "Katsu Ou Ji." It means that the temple that triumphs over His Imperial Highness. Since then, Katsuoji has been highly respected by people.