These ebuilds come from http://jyujin.de/.
If you have some problems, go to the official site first.
update-live-ebuilds : This is a program to update all files from various live repositories in portage ( http://avuton.googlepages.com )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a jyujin
For Paludis use this rsync : rsync://gentoo.zugaina.org/jyujin-portage
If you have a problem : ycarus(-at-)zugaina.org