During the Sengoku period (the Warring States period (Japan)), Norifusa ICHIJO moved down to Tosa, which was his fief, and the branch family became a Sengoku-daimyo (warring lord), the Tosa-Ichijo family.
また、戦国時代(日本)には一条教房が所領であった土佐に下向し、分家が戦国大名化し土佐一条氏となった。