Please post the resolution on this thread as we are also missing our Japanese menu text. Here's what we've discovered so far.
1) On a Japanese OS (XP or Win2K), the main menu text is missing. The submenus are fine.
2) On an English OS, configured to show the Japanese menus, the main menus and submenus are fine.
3) Rolling back from 1.3.1 to 1.1.3 seems to fix the problem.
Thanks for looking into this.