I've never actually seen Kill la Kill, but I have seen its cosplay. It's a show about skin, suspenders and a giant sword, right?
That sword is here now, in the real world, and was built by Harrison Krix. It's an interesting design, both to look at and to have to build, because it's technically one half of a pair of scissors, so one side of the sword is completely flat.
He actually built two copies of the sword; one went to a client who commissioned it, while the other was auctioned off for charity and went for $6000!
You can see more pics, and read how the blade was actually built, on Harrison's site.