vflib is Japanese vector font library.
TrueType, Zeit, JG, BDF fonts are supported.
Watanabe-vector font is used by default for mincho(min) and gothic(goth).
You can use your own font by installing them (/usr/share/font/ is recommended)
and modify /usr/local/lib/VFlib/vfontcap file.

See /usr/local/lib/VFlib/doc/man.ps or
http://www.se.hiroshima-u.ac.jp/~kakugawa/Hacks/VFlibMan/Index.html for
more details (in Japanese)