Acrobat Pro 9.3.1 does not convert certain Japanese characters

Question

I have a text document that contains a mix of Roman and Japanese characters - when I do Create PDF From File and read that text document in, there is a sequence of 2 Japanese characters that disappear - the text before them and after them appear in the PDF, but there's a void between.
The sequence is (don't know if I can insert Japanese in here...)
before監査証跡after
When the PDF is generated, the first 2 Japanese characters (after the last 'e' in before) do not appear in the PDF.
Here is the source text document (UTF-8 encoded with BOM): http://www.scribd.com/doc/28158046
and here is the resulting PDF: http://www.scribd.com/doc/28158121
Anyone seen this before?

Answer 1

If I paste your "before監査証跡after" into Notepad and save it as UTF-8 text, I can print the file to the Acrobat 9.3.1 Pro "Adobe PDF" printer with no problems at all: the 4 kanji appear in a font Acrobat calls "MS-UIGothic".  If I right-click on the saved *.txt file in Windows Exploreer (Vista 64) and select "Convert to Adobe PDF" I still get all the kanji, although the first shows up in Adobe Ming, the 2nd in Adobe Song, and the last 2 in KozGoPr6N.
I can't explain what's going on here, but perhaps this can help point you down a useful path.
David