Talk:Ochimusha/@comment-24464674-20170410020126/@comment-10429980-20170410125205

Yeah, since usually only women can turn into monsters it should be assumed that is what the text is talking about. Of course men "slain" by the swords could become incubi (and perhaps in Zipangu incubi are considered a variety of yokai as well, or being related to them).

Its important to keep in mind the point of the "slaying" though, namely to create a region where the birth of males is impossible and thus the ochimusa can birth an heir as the man's family/society will have no choice but to accept a female heir if it wants a heir at all.