Trouble with Japanese characters

Question

Possible Duplicate:
miktex can't find udmj.cfg

I've tried to write japanese characters in LaTeX, but it generates errors, this is what I've done (realy, this is from this from this link How to write Japanese with LaTeX?)

\documentclass{memoir}

\usepackage{CJKutf8}

\begin{document}

\begin{CJK}{UTF8}{min}未練なく散も桜はさくら哉\end{CJK} \\
without regret \\
they fall and scatter\ldots \\
cherry blossoms

\end{document}

this is the output:

! Font C70/min/m/n/10/67=udmj67 at 10.0pt not loadable: Metric (TFM) file not f
ound.
<to be read again>
relax
l.7 \begin{CJK}{UTF8}{min}未
ç·´ãªã散も桜ã¯ã•ãら哉\end{CJK} \\
I wasn't able to read the size data for this font,
so I will ignore the font specification.
[Wizards can fix TFM files using TFtoPL/PLtoTF.]
You might try inserting a different font spec;
e.g., type `I\font<same font id>=<substitute font name>'.
! pdfTeX error (font): invalid font identifier.
\font@name ->\C70/min/m/n/10/67
l.7 \begin{CJK}{UTF8}{min}未
ç·´ãªã散も桜ã¯ã•ãら哉\end{CJK} \\
Here is how much of TeX's memory you used:
5126 strings out of 494053
64712 string characters out of 3146185
143067 words of memory out of 3000000
8399 multiletter control sequences out of 15000+200000
4238 words of font info for 16 fonts, out of 3000000 for 9000
715 hyphenation exceptions out of 8191
34i,1n,21p,189b,859s stack positions out of 5000i,500n,10000p,200000b,50000s
! ==> Fatal error occurred, no output PDF file produced!