Well, there is =(
I had already played Ibara and thought it was much harder than DOJ, but I didn't really like it, so I kind of ignored it.. Ketsui is up there with Ibara, if not harder.
@ Aisha: The port is very good. There are NO loading times at all. There are plenty of interesting options, and although it lacks an HD treatment, 5pb added some image filters, so it looks kind of good even on my 50" plasma. Well, better than DOJ anyway.
People who've played both the arcade and the port say it's very faithful. Ketsui never relied much on slowdown anyway, so it's not a big surprise.
I really enjoyed it, too bad it got here in a bad time, as I was having so much fun with Deathsmiles I think I'll go back to it today after work.