Rubuta ci gaba don wannan sakin layi - Empress Kōken na farko ya yi sarauta daga 749 zuwa 758, sannan, biyo bayan Fujiwara no Nakamaro Rebellion
, ta sake hau gadon sarauta a matsayin Empress Shōtoku daga 765 har zuwa mutuwarta a 770. Empress Kōken ya shiga cikin wani al'amari tare da firist Dōkyō kuma ya nada shi Babban Minista a shekara ta 764. A shekara ta 766, an daukaka shi zuwa Hōō (sarkin firist) kuma a shekara ta 770 ya yi ƙoƙari ya hau gadon sarauta da kansa. Mutuwar Empress da juriya daga aristocracy ya rushe shirinsa. Wannan lamarin shine dalilin da ya sa aka koma babban birnin kasar Japan daga Nara (Heijō).