I have a page that shows fine in my browser: http://cheers-sendai.com/index.php. It's in Japanese and it uses 'shift_jis'. When I view the source, I can read the Japanese OK, but when I put it in a text editor to edit it, the characters are all messed up - it's unreadable. That obviously makes it difficult (actually, impossible) to edit. How can I fix this?
It was originally written in Dreamweaver if that helps...

Thanks for any help.