1 mnihongo is a fairly clumsy troff post-processor that 
2 catches unicode characters that might be japanese,
3 looks them up in a font file (currently
4 /lib/font/bit/pelm/unicode.9x24.font) to get the
5 bits, converts that to postscript, and dumps that
6 in the output.
7 
8 Widths are taken from troff font Jp, which has at
9 best a simple approximation to the truth.
10 
11 The program itself is normally called implicitly
12 by loading the troff macro package -mnihongo, which
13 does a .pi command.