1 You need a few works around when you make Japanese htmls.
2 And I don't succeed to treat Japanese characters on texi2dvi, so I haven't had pdf file yet.
6 On Mac OS (Snow leopard), /usr/bin/sed doesn't treat Japanese characters correctly, so I used gsed 4.2.1 in extract_categories.sh.
7 2. install texi2html 5.0.
8 texi2html 1.76, which is a version appended in Maxima, doesn't treat Japanese characters correctly, too, so I used texi2html 5.0 (/opt/local/bin/texi2html) in extract_categories.sh.