But in the Kamakura period, jisha declined in influence while shugo (governors) and jitō (manor administrators) grew dominant.
During the early Muromachi period, the people of Iga became independent of their feudal overlords and established a kind of republic—Iga Sokoku Ikki (伊賀惣国一揆) in Japanese.
In 1582, during the turmoil following Oda Nobunaga's death, Hattori Hanzō advised Tokugawa Ieyasu to escape to Mikawa through the Kōga and Iga regions.
They continued to serve the shogunate as a musketeer unit and as dōshin, low ranking samurai policemen, with their ninja skills gradually fading out in later generations.
This modernized model is very often seen in various pop culture ninja media such as the Naruto franchise and the Shinobi no Mono movie series starring actor Ichikawa Raizo.