Hiroitho lives to 2001

What if the Tenno makes it to 100 years instead dying in 1989 ? Maybe at such a advanced age he would have already abdicated.
 
Probably not much affect to Japanese politics. But he might abdicate if his health is clearly declinging. But abdication is not easy operation in Japan. Even in OTL current emperor Akihito has planned abdication but it not be so simple.
 
Top