Japanese text in English pages

How to display Japanese text in ALT tags in english pages

[angiolo]

Is it possible to display Japanese text in an English language page?

I have a site in English, whit a Japanese flag image pointing (linking) to the Japanese version site.

Actually, the ALT Tag description over the Japanese flag is in English.

Is there any possibility to show that description in Japanese language?

[g1smd]

You will probably need to use the UTF-8 character encoding (sort of, aka Unicode) rather than a limited character set like ISO 8859-1, or others, and then declare this usage in the meta tags:
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">