Hey!! So, this is my first time posting here, in fact I just joined *is slow*. Anyways, here are some brushes for GIMP 2.0 (.gbr files).
Check it out here at my journal. Thanks^^
Also check out this post for some more brushes originally by marikitdoodles but converted to GIMP 2.0. The pack includes Kanjani8 as well as other various Johnny's groups.
PS. Ermm if I did this wrong, tell me and I'll fix it.