The ancestors of the Hattori-family (服部氏) may have been weaving craftsman from ancient China but historical documents about the Hattori-family as the leaders of the Iga Clan appeared during the life of Hattori Hanzo Yasunaga (保長). In the Muromachi-period (室町時代 1333-1573), Iga-mono led by Yasunaga obeyed the Ashikaga-Shoguns (足利将軍). When the Ashikaga-Shogunate fell, Yasunaga and his crew abandoned the Ashikaga-family and found new employers, the Matsudaira-family (松平家). One of the descendants of the Matsudaira-family is Tokugawa Ieyasu (徳川 家康) who would hold the Edo-Shogunate (江戸幕府) in 1603. Yasunaga left from Iga (伊賀) to Mikawa (三河), the headquarters of the Matsudaira-family, with his 200 shinobi. Yasunaga and the 200 shinobi worked for the Matsudaira-family conducting espionage and working as the watchmen of their castle, contacting and exchanging information with native Iga-mono.