 However, Sushun began to resent the power of Soga no Umako, the head of the Soga clan, and Umako, perhaps out of fear that Sushun might strike first, had him assassinated by in 592.When asked to accede to the throne to fill the power vacuum that subsequently developed, Suiko became the first of what would be several examples in Japanese history where a woman was chosen to accede to the throne to avert a power struggle.Suiko's contemporary title would not have been "tennō", as most historians believe this title was not introduced until the reigns of Emperor Tenmu and Empress Jitō.