The Assassination of the Emperor Shotoku

Soga noumako, the head of the soga clan at this time, hired some one to stab the emperor to death after inviting him to a social affair. In the after math, soga no umako decided to elevate a woman, specifically, empress suiko,. He was operating under the assumption that she would be easier to control. One year after her elevation, siko announced the young prince shotoku as her sesho, a regent who would manage the realm on her behalf.