If you can't see japanese characters , you need:

1. Web browser which support japanese encoding , Ex:Netscape, Explorer.

2. Japanese language support:

Windows: NJ-Star , UnionWay , AsiaSurf , Win/V , RichWIN , Twinbridge , UnionWay or Tango

ps: if you use Microsoft Internet Explorer, you can install Multilanguage support

Mac: Japanese Language Kit , Elixir , Machina Sapiens or Japanese Fonts(University of Oregon)

Otherwise:

You can use Shodouka service