This is not accurate. Japan is a conservative country, yes. However women aren't expected to give up work on marrying at all. Equally although i have heard much about how racist Japan supposedly is, this was not at all.my experience when visiting rural Japan with my (Japanese) ex, our mixed race son and my older mixed race (half black half white) son from a previous relationship. My older son was embraced into the Japanese family in exactly the same way as my younger one and was treated exactly the same. This is a rural farming family where my ex's parents were in their 80s and most of their relatives in general over 70.
My son and I did not face any racism at all in Japan from the community at large either.
Homophobia, well. It is true that being gay isn't something you hear much about in rural Japan, maybe in Tokyo etc they are a little more advanced, so there may well be homophobia.
The Koseki Tohon which is the Japanese family record is a fairly strict document and inflexible. That's just how it is. The fact is that the people in question should have done their research. My son doesn't have Japanese nationality because under Japanese law if the parents are unmarried the father must recognise the child as his at the consulate officially BEFORE birth for.it to be a smooth process. When I spoke to the Japanese consulate about this it was a brick wall of "that's how things work in Japan." and I imagine the people in the story had a similar response. And, well, that IS how it is in Japan, like it or not. After that it takes a significant amount of time to get Japanese nationality for the child and we never got around to it.
Japan isn't flexible. No means no. So I can completely see how in this case the person provided the sperm and wants to be registered as "parent" ....nope. sperm provider is "ottosan" (father) . "Ottosan" = "man". So that would be end of discussion, I imagine. I haven't mentioned this case to my ex but I am quite sure that if I did his response would be "yeah, so? He should have thought of that, that's how things are in Japan".