Sadamichi ISHIKAWA served Hideyoshi TOYOTOMI in Tensho era as the Kenchi survey magistrate of Yamashiro Province, and occupied 12000 koku (crop yields) in Yamashiro Province and Amata county, Tanba Province around 1599 to 1600.
天正年間に豊臣秀吉に仕え、山城国検地奉行を務め、慶長4-5年頃に山城国内および丹波国天田郡において1万2000石を領した。