Hiroki (note CC'd to the mdocml mailing list),

This regards today's conversation about mdocml and Japanese characters 
at the FreeBSD summit.

Enclosed is a screenshot of a locally-modified mandoc producing 
on-terminal UTF-8 glyphs for kanji (I have NO IDEA what these characters 
mean, I just picked them from the Unicode reference).  I hacked this in 
as a demonstrandum that it's possible to have UTF-8 output without much 
effort.

I used the groff \U'xxxx' input escape sequence to specify Unicode 
input.  Unfortunately, this doesn't seem to be officially supported by 
groff.

   http://lists.gnu.org/archive/html/groff/2000-04/msg00036.html

My question is this: do you know of the most reliable to feed groff 
Unicode codepoints?  I'm not sure when a -Tutf8 will exist for mandoc, 
but the screenshot demonstrates that it's in principle possible.

Thanks,

Kristaps