Also one of the requirements could be called raising assets. That had become the main reason why the number of such women was increasing.
It was hopeless. Since those unmarried women had to be supported until death for sure, the amount of those mentioned ojousan’s increase at top of the households in the end.
Putting them up for adoption into households of lower family status and marrying from there, such an option existed as well. But if the other party didn’t want to adopt them, it became difficult.