Doesn't it also happen in Japan that husband "marries into wife's family", and takes her surname?
It might not be common, but it's still well-known and accepted. In the rest of the world it's much more rare.
96% of the time the husband's surname is taken. I assume the 4% is if the wife's family has higher status or he's taking the name because he's a successor of some kind. I'm sure there's another couple reasons why.
I was more facepalming at the delay in remarriage for women only, it's going to be reduced to 100 days but that's still discrimination and the law has no basis since we can easily do DNA testing to determine the child's genetic lineage