yoritsune

Whether the Miura family were really involved in this plot, history gives no definite indication; but certainly the ex-shogun, Yoritsune, was involved, and his very marked friendship with Miura Mitsumura could scarcely fail to bring the latter under suspicion. In the end, the Miura mansion was suddenly invested by a Hojo force.

F. (Frank) Brinkley - A History of the Japanese People : From the Earliest Times to the End of the Meiji Era

In the face of this rebuff, nothing remained for the Bakufu except recourse to the descendants of the Minamoto in the female line. Yoritomo's elder sister had married into the Fujiwara family, and her greatgrandson, Yoritsune, a child of two, was carried to Kamakura and installed as the head of the Minamoto.

F. (Frank) Brinkley - A History of the Japanese People : From the Earliest Times to the End of the Meiji Era

The murder of Sanetomo inspired the Court with strong hope that a suicidal feud had commenced at Kamakura, and when the Fujiwara baby, Yoritsune, was sent thither, peace-loving politicians entertained an idea that the civil and the military administration would soon be found co-operating. But neither event made any change in the situation.

F. (Frank) Brinkley - A History of the Japanese People : From the Earliest Times to the End of the Meiji Era

It will be remembered that after the murder of Minamoto Sanetomo by his nephew Kugyo, in 1219, some difficulty was experienced in persuading the Imperial Court to appoint a successor to the shogunate, and finally the choice fell upon Fujiwara Yoritsune, then a child of two, who was not actually nominated shogun until 1226.

F. (Frank) Brinkley - A History of the Japanese People : From the Earliest Times to the End of the Meiji Era