In addition, the changes in the conditions surrounding private mountain estates in Kumano which took place during the time from the Muromachi Period to the Sengoku period (period of warring states) in Japan helped Kumano Sanzan Kengyo and Sanzan Bugyo which was placed under Kumano Sanzan Kengyo to increase the power over Kumano Sanzan.
加えて、室町時代から戦国時代(日本)にかけて熊野山領の荘園の状況の変化は、熊野三山検校やその下におかれた三山奉行の熊野三山に対する影響力を増大させる方向に働いた。