Tearing out my hair here.
Both the latest versions of Wordpress and the Postie plugin are installed.
The blog is encoded utf-8.
Posting through the interface - fine.
Posting via email (using Thunderbird) - fine.
Posting via keitai (cell phone) - Japanese text does not show up correctly.
Japanese phone messages are encoded ISO-2202-JP. I have altered the conversion code in the postie-functions.php but this didn't work. Same result.
English text, images and video show up fine.
Any solutions or links to information much appreciated!