I use Macintosh, so I can only assume that Netscape Communicator and Internet Explorer for windows have the similar setup.
If you use Netscape Communicator.
Go to "View" and choose "Japanese" from "Character set."
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And go to "Preference" and choose Japanese fonts for encoding Japanese.
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If you use Internet Explorer, go to "View" and choose "Japanese (AutoDetect) from "Character Set."
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Also, go to "Preference" and choose Japanese fonts for Japanese character set.
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