1. Japanese input is realized through: uim anthy

2.  Japanese in the program ( e.g. BM ) is partly English (probably in the gtk+ library).

3.  Reconfigure locales:

#dpkg-reconfigure locales;

Select  “ja_JP.UTF-8;

root@debian-yu:/home/kiyoshi# locale
LANG=ja_JP.UTF-8
LANGUAGE=
LC_CTYPE=”ja_JP.UTF-8″
LC_NUMERIC=”ja_JP.UTF-8″
LC_TIME=”ja_JP.UTF-8″
LC_COLLATE=”ja_JP.UTF-8″
LC_MONETARY=”ja_JP.UTF-8″
LC_MESSAGES=”ja_JP.UTF-8″
LC_PAPER=”ja_JP.UTF-8″
LC_NAME=”ja_JP.UTF-8″
LC_ADDRESS=”ja_JP.UTF-8″
LC_TELEPHONE=”ja_JP.UTF-8″
LC_MEASUREMENT=”ja_JP.UTF-8″
LC_IDENTIFICATION=”ja_JP.UTF-8”
LC_ALL=
4. Even the program already compiled in “en_US.UTF-8”  ( e.g. BM ) exhibited Japanese label correctly, but all the system run in Japanese.