I just posted a thread on if I should get a Chosera cause I think my Naniwa 1k is too slow. Don't get me wrong, I like my Naniwa 1k. It feels smooth and I really like the feedback I get from it.
There are 2 1k stones made by Naniwa that we us eon razors Naniwa Chosera and Naniwa Super Stone, you have the latter.