On Sep 17, 2008, at 4:58 AM, Michal Suchanek wrote:

>> In unicode, it is represented by
>> KATAKANA LETTER SE with
>> COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK.
>>
...
> y guess is this is not very common letter. I have no idea what it
> means but then I have no idea about many other less obscure
> combinations either.

It's not just an Asian thing.  The Welsh language has common  
"characters" that require combining diacritics because there's not a  
single Unicode code point.  Those combining characters exist for a  
reason.  Also see http://en.wikipedia.org/wiki/Heavy_Metal_umlaut

  -Tim