If you would like to enter Japanese text with IMKit-Anthy into the Zaurus, you
must have two things:

1. IMKit-Anthy (Anthy Input Method)
2. An Unicode font to display the Japanese characters

!! At first, make a backup of all your data, in case of data loss !!

You need the following packages, which can be downloaded from
http://zaurus-ja.sourceforge.jp/feed/

- anthy_3500c-1_arm.ipk (*)
- imkit-anthy_0.3.5-1_arm.ipk (*)
- libqte-ja_2.3.3-6_arm.ipk (not needed, if you have a German ROM of version
  2.38G or higher in your Zaurus SL-5500G)
- unismall_1.0.0_arm.ipk (not needed, if you already have another Unicode font
  installed)

And from:
ftp://ftp.handhelds.org/pub/linux/dists/familiar/feeds/unstable/packages/armv4l/

the Package:
libstdc++2.10-glibc2.2_2.95.4-0.010407-fam1_arm.ipk

// Packages with a (*) can also be installed onto a SD- or a CF-Card. \\

After the installation, you should be able to see the IMKit-Anthy in the input
method menu (the one where you change from Handwriting to On-Screen keyboard,
for example), and should be able to insert Japanese text into applications
which support Unicode.