In netscape, you have to set Options->"Document Encoding" to be Japanese(auto-detect). I do not know about other browsers.
The following string is encoded in EUC format. It displays under netscape for me fine. If you cannot see a string of hiragana characters, that probably means you do not have an appropriate font for your browser to display it with.
クン キン おし.える よ.む くん.ずる
Start with getting the right fonts
For windows, I hear there is a free "japanese language kit" you can download
from microsoft.
See my unicode java on microsoft
pages.
For Unix/X, if you want to specifically display EUC charsets, rather than
Unicode, then you need to download something in the "jisx-0208" family.
Sorry, I don't know about other platforms. Although I hear Macintosh owners
with an OS older than MacOS X have to shell out $$$ for the Japanese Language
Kit. Then follow the appropriate instructions for your browser.
[MacOS X users can use the free (?) japanese kit]
Alternatively, you might try the shareware UniText. Please let me know if this works for you.
For java-related font usage [that is, from something based on the JDK], you should look at my quick Unicode How-To guide