I have installed LibreOffice 3.4 Beta 5 directly from upsteam. http://www.libreoffice.org/download/pre-releases/ Then the problem has gone. Every tab shows Japanese characters properly.
** Attachment added: "3.4.0-beta5.png" https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/773034/+attachment/2134544/+files/3.4.0-beta5.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773034 Title: Japanese characters on selected tabs not shown with "Screen font antialiasing" on -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs