 It used to be also called (short for ).The extraordinary events, the historical characters and the culture of the twenty years which go from Minamoto no Yoritomo's birth to the assassination of the last of his sons have been throughout Japanese history the background and the inspiration for countless poems, books, jidaigeki TV dramas, Kabuki plays, songs, manga and even videogames; and are necessary to make sense of much of what one sees in today's Kamakura.Yoritomo, after the defeat and almost complete extermination of his family at the hands of the Taira clan, managed in the space of a few years to go from being a fugitive hiding from his enemies inside a tree trunk to being the most powerful man in the land.