@Ordinary:
The Washuu? Okay, I'm a bit skeptical about a Ghoul exterminating clan founding the CCG. Wasn't it mentioned that the CCG initially used firearems and that it was a pain in the ass to kill Ghouls that way? How on earth was there an elite clan going around murdering dozens of Ghouls at a time. I suppose they would aim for the eyes (only weak spot/place to inject RC suppressant), but here they don't seem to suggest such.
Some samurai clan going around exterminating Ghoul with…katanas? I don't think so. It was a strong point made that only Ghouls could hurt other Ghouls. Remember Kaneki stabbing himself with a knife? One of the more intense scenes in this series? Surprise Ishida Sui doesn't seem to remember that. I thougth he was one of those mangaka who remember every single thing about there manga(Oda).
On a brighter note, I expect Tokyo Ghoul to have better usage of German than Bleach.
I feel that Imperial scan translation was wrong. Another translation was different from what the put.http://imperialscans.com/read/tokyo-ghoul-re/14-touched-by-the-rhyme/5
"Using their unique skill to battle against ghouls, one of the clans who made a living by exterminating ghouls—- “Washuu"