Board Thread:General Discussion/@comment-24098614-20190904224312/@comment-35248429-20190908142604

Otaku4469 wrote: Japan has a disgusting habit of permitting sexual relationships with cousins it is legal there including the fact that the Prime Minister is married to one.

Suguha in Sword Art is the cousin of Kirito, and by law can engage in a serious relationship with him with no repercussions. It's still legal in over half the united states. 1st cousin marriage is not rare in the rest of the world. Japan has only recently started to move away from inter-familial marriage, but it still comes up a lot in their fiction because of how recent the practice was common in their history.