XHTML validation

I have just completed a Japanese Web site using CHARSET=x-sjis and tried to
validate via http://validator.w3.org/
It does not validate as it goes beyond the coding into the content. Is there
any way that I can validate to ensure the site is XHTML compliant.
Thanks
Cary Bush

11 Dunsford Place
Bath
Tel 01225 422100
Fax 01225 422550