User blog comment:Rtys8/Okay.....i'll have to aplogize a bit on some slight accuracy issues./@comment-16526045-20140612142404

I dont quite remember anyone speaking about Onikiri and Kumokiri in Sin Damnation and Atonement Girl,but just for  reference......

But like Kannagiri,the legend of these two swords aren't as well known as Raikiri,Kougarasumaru or Doujikiri in english,so obscure research references are needed to understand the origins of these lesser known blades.