http://www.gigasize.com/get.php/3194...shi_Vol_01.rar
For volume 1 of Onikakushi.
I thought I had uploaded Ch04, but apparently not =/ I'll edit this post when I finish uploading.
For other arcs, try the lurk manga archive. Should have them there.
Edit:
http://www.gigasize.com/get.php/-110...vol02_ch04.rar
For chapter 4.