body#tinymce.wp-editor {
    font-family: <br />
<b>Warning</b>:  Undefined variable $fontname in <b>/usr/home/mw2pnryk89/www/htdocs/wordpress/wp-content/plugins/japanese-font-for-tinymce/default-font-css.php</b> on line <b>19</b><br />
 !important;
}
<br />
<b>Deprecated</b>:  PHP Startup: Use of mbstring.internal_encoding is deprecated in <b>Unknown</b> on line <b>0</b><br />