Merged from r11536 trunk to 2.3-stable (#13349)

Japanese translation updated by Go MAEDA.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11540 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged from r11537 trunk to 2.3-stable (#13350)

fix some Japanese "issue" translations.

Contributed by Go MAEDA.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11541 e93f8b46-1217-0410-a6f0-8f06a7374b81