WI: Japan with dynastic cycle

What of Japan also adhere to the concept of dynastic cycle like China, instead of having a single, continuous ruling dynasty?

How will Japanese history turn out in this scenario.
 
One could argue that the shogunates follow the dynastic cycle, considering the Emperor held little actual power between the Heian period and the Meiji restoration. The emperors of Japan are sort of like the Late Merovingians, except they were never overthrown.

First was the decline of the main line's authority in favor of the Minamotos, who were then overthrown by the Ashikagas, who were then overthrown by the Tokugawas.
 
One could argue that the shogunates follow the dynastic cycle, considering the Emperor held little actual power between the Heian period and the Meiji restoration. The emperors of Japan are sort of like the Late Merovingians, except they were never overthrown.

First was the decline of the main line's authority in favor of the Minamotos, who were then overthrown by the Ashikagas, who were then overthrown by the Tokugawas.
Question,given that the Shoguns were cadet branch members of the Imperial family,is it possible for them to be adopted by an emperor that's childless?
 
That would need the emperor to mean something than an over glorified figurehead. Although technically Japan today is ruled by a different branch of the same family, consider the original branch was overthrown in the Nanboku-Cho wars.

Question,given that the Shoguns were cadet branch members of the Imperial family,is it possible for them to be adopted by an emperor that's childless?

I'd say no, the line of descent for some families could of been so distant, it would be questionable at best, and might need lots of the imperial family to die.
 
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