Since most territories of Koga and Iga were shoen (manor in medieval Japan) in the Kamakura period, they were not controlled by shugo (provincial constable) or jito (manager and lord of manor), but when the shoen system collapsed in the Sengoku period (in Japan), dozens of jizamurai groups struggled for power.
甲賀と伊賀は、鎌倉時代にはその領地の大半が荘園だったため守護や地頭による支配を受けなかったが、戦国時代(日本)になり荘園が崩壊すると、地侍が数十の勢力に分かれ群雄割拠した。