Tokyo —

Japan may have its first ever female prime minister, but her government’s attempts to avoid a royal succession crisis are making the chances of a woman taking the imperial throne ever slimmer.

With just three eligible heirs to the Chrysanthemum throne – and two of them 60 or over – the imperial family is facing a succession crisis.

Japan’s monarchy has for centuries maintained male-only succession, which is on-brand for a deeply patriarchal society where men dominate other spheres of life such as business and politics.

Now, that rule has come to threaten the very survival of the world’s oldest monarchy which, in recent decades, has spawned more daughters than sons.