activities. Definition Extent It has been pointed out that the Battle of Ōshū fought between the Kamakura government and the Northern Fujiwara in 1189 was in fact the last battle during this period of civil war, as it completed Yoritomo's nationwide domination through the annexation of Dewa and Mutsu Province, and that its end marked the establishment of the first military government, the Kamakura shogunate. Name The terms Genpei Kassen (源平合戦), Genpei Sōran (源平争乱) and Genpei no Tatakai (源平の戦い) are sometimes used in Japan, but it has been argued that it is not appropriate to use the term "Genpei" for this war, as it does not accurately represent the belligerents of the war. In fact, the head of the Minamoto clan at the time was not a samurai but a court noble, and the first samurai to be the head of the clan was Ashikaga Yoshimitsu in the 14th century. In reality, it was not exclusively a war between the Minamoto clan and the Taira clan, and there were many members of the Taira clan fighting on Minamoto clan's side, as well as members of these two clans serving as court nobles at the Imperial Court that were not samurai and had nothing to do with the war. There is no record of any direct or indirect complicity or assistance by the non-samurai Minamoto and Taira clan members to the war, and no record of any motive for their involvement exists. Furthermore, the Battle of Ōshū was fought between Minamoto no Yoritomo and his last strong enemy, the Northern Fujiwara, years after the Taira clan had been destroyed. It is true that many members of the Minamoto clan, such as Takeda Nobuyoshi and Minamoto no Yoshinaka, rose to arms against the Taira clan. There were also many who belonged to the Minamoto clan, but who fought for the Taira clan because they had a kinship or a duty to the Taira clan. Although the various Minamoto clans rose up simultaneously, not all of them were under the command of Minamoto no Yoritomo from the beginning. In fact, the actual Kawachi Genji had no single legitimate lineage, and even if we were to limit ourselves to the succession of Minamoto no Yoshiie, who was the representative samurai of the Kawachi Genji, it was not only Yoritomo who could have claimed that position. Yoritomo was the heir of Yoshitomo, who had risen