Wasn't this female demotion practice an acquiescence to convince the Americans to let them keep their Imperial family? I think it was so the Imperial Family wouldn't grow back as big as it had pre-war.
I don't know what changes were made, but some were indeed made for the Americans, so they wouldn't abolish the imperial family or sth like that.
This might be the reason for that.
But remarkably, in spite of our time, the Japanese are medieval when it comes to how the imperial family is structured. There is only one
child, and because of that one(!!) child they stopped any discussion on female inheritance. Madness. The family is literally about to die out and the number of official members is at a ridiculous low.
It's ridiculous to not allow a woman to inherit, and equally ridiculous to banish a woman from the official family, even though she was born into it and as pointed above give the commoner married-in husband a title, which the (imperial born) wife has no right to.
I am a fan of many things that are Japanese and admire them for many many things, but this is utter BS.
If I'm not mistaken they completely abolished the aristocracy, right?