These ebuilds come from http://ebuild.gentoo.gr.jp/.
If you have some problems, go to the official site first.
jnethack-cvs : Japanized Nethack ( http://jnethack.sourceforge.jp/ )
noegnud-jnethack : an alternate 2D/3D graphical user interface for JNetHack ( http://noegnud.sourceforge.net/ )
tome : Japanized Tales of Middle Earth ( http://t-o-m-e.net )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoojp
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoojp-portage
If you have a problem : ycarus(-at-)zugaina.org