User blog comment:Rtys8/Okay.....i'll have to aplogize a bit on some slight accuracy issues./@comment-1960111-20140609141703

If you can fin out more information, it'll be great. But even if you can't, it's fine too. At the moment we know how the blades work, and a bit of history behind it so that's plenty of information.

Regarding Onikiri and Kumokiri, I think there won't be much left to find out, since the only person who knew about them is also the one who does't care about anything aside from utility.