dvipdfmx example.dvi
example.dvi -> example.pdf
[1
kpathsea: Running mktexpk --mfmode / --bdpi 600 --mag 0+555/600 --dpi 555 rml
/usr/pkg/bin/mktexpk: gsftopk: not found
mktexpk: don't know how to create bitmap font for rml.
mktexpk: perhaps rml is missing from the map file.
kpathsea: Appending font creation commands to missfont.log.

dvipdfmx:warning: Could not locate a virtual/physical font for TFM "rml".
dvipdfmx:warning: >> There are no valid font mapping entry for this font.
dvipdfmx:warning: >> Font file name "rml" was assumed but failed to locate that font.
dvipdfmx:fatal: Cannot proceed without .vf or "physical" font for PDF output...

No output PDF file written.

uncomment %f cid-x.map
then

dvipdfmx example-J.dvi
example-J.dvi -> example-J.pdf
[1
dvipdfmx:warning: Could not read encoding file: H
dvipdfmx:warning: Could not locate a virtual/physical font for TFM "rml".
dvipdfmx:warning: >> This font is mapped to a physical font "Ryumin-Light".
dvipdfmx:warning: >> Please check if kpathsea library can find this font: Ryumin-Light
dvipdfmx:fatal: Cannot proceed without .vf or "physical" font for PDF output...

Good one has followins lines. Bad one is practically empty.

CF-SX2-252@makoto 01:33:16/211104(..git-work/F7000s-certify)% cat   /var/lib/texmf/fonts/map/dvipdfmx/updmap/kanjix.map
% /var/lib/texmf/fonts/map/dvipdfmx/updmap/kanjix.map:
% maintained by updmap[-sys] (multi).
% Don't change this file directly. Use updmap[-sys] instead.
% See the updmap documentation.
% A log of the run that created this file is available here:
% /var/lib/texmf/web2c/updmap.log
gbm 2004-H HaranoAjiGothic-Medium.otf
gbmv 2004-V HaranoAjiGothic-Medium.otf
rml 2004-H HaranoAjiMincho-Regular.otf
rmlv 2004-V HaranoAjiMincho-Regular.otf

The file is installed by the package

SX3@makoto 16:33:00/211103(..git-work/F7000s-certify)% makedbm -u /usr/pkg/pkgdb/pkgdb.byfile.db|grep kanjix.map
/usr/pkg/share/texmf-dist/fonts/map/dvipdfmx/updmap/kanjix.map tex-updmap-map-2020

Not really sure because of tex-cjk-gs-integrated related or not.