Assuming you want to know the dependencies of a manually installed package and you have a working texlive environment, you can run:
tlmgr install --dry-run <package name>
to show the package dependencies (not only fonts). In the case of CJK the output will be:
install: dry run, no changes will be made
[1/8, ??:??/??:??] install: arphic [26878k]
[2/8, 00:00/00:00] install: cjk [1531k]
[3/8, 00:00/00:00] install: cns [2916k]
[4/8, 00:00/00:00] install: fonts-tlwg [5898k]
[5/8, 00:00/00:00] install: garuda-c90 [5k]
[6/8, 00:00/00:00] install: norasi-c90 [10k]
[7/8, 00:00/00:00] install: uhc [3516k]
[8/8, 00:00/00:00] install: wadalab [17450k]
then you can download and install the other dependencies manually.
If tlmgr is not available you can search the internet for the fontname (uwmjb) in your case and you'll eventually find the relevant package.
tlmgr install --dry-run cjkand see what packages are installed alongisde your target package, then procede to install them manually too. If you don't have any tlmgr version installed you may serch for theuwmjbstring on the internet and you'll eventually find it's uhc – d-cmst Jun 25 '13 at 07:21uwmjb, and that the following 0 and the preceding parts can be ignored.) – Yoav Jun 25 '13 at 10:49