These ebuilds come from http://ebuild.gentoo.gr.jp/.
If you have some problems, go to the official site first.
pykf : Python Codecs for Japanese Language Encodings like EUC, Shift-JIS, ISO-2022 ( http://sourceforge.jp/projects/pykf/ http://pypi.python.org/pypi/pykf )
python_chasen : Python chasen module ( http://www.domen.cx/yusei/pub/ )
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