/usr/share/texmf/dvi2ps/fontsk/asc-three is in dvi2ps-fontdata-three 1.0.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # built-in morisawa fonts for pTeX / ASCII Nihongo TeX
# First, convert pTeX dvi -> built-in kanji dvi by virtual font
font jvf * 0 $tmf/vf/ptex/a2$bk/%f.vf
#font jvf * 0 %f.vf
# then, use built-in kanji
fontdesc bikan-$ext
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