I have 'switched' my C3000 to Japanese, but still retain the Japanese IME. I'm able to write documents in Japanese and also read emails sent to me that are written in Japanese.
However I have noticed that if I send an email that contains Japanese, the recipient just gets a bunch of

where the japanese chracters should be.
I've looked into it and the Content-typeis set to:
text/plain; charset="iso-8859-1"
I can't find any way to change the encoding when I send or write emails using the default email client.
Does anyone know a work-around for this or can anyone recommend another email client I could use that supports Japanese?