Learn more about the famous samurai story, the "Tale of the Heike" and hear Asian Art Museum Storyteller, Leta Bushyhead, tell an excerpt from the tale. This video include artworks from the Asian Art Museum's collection.
I think she may have been insinuating that the changes that culminated in the establishment of the Kamakura shogunate were long-running: the gradual weakening of imperial authority, the expansion of private land holding in the provinces that undermined the imperial tax base, a growing population contending with insufficient food production, the rise of a provincial upper class that was increasingly relied upon by the Kyoto nobility for military service. All these things contributed to creating favorable conditions for the Minamoto to seize power after defeating the Taira. The bakufu was not born purely out of the Genpei War.