There is already quite a bit of migration code out there. I think the version number record can be added, which may be helpful for later mmd_tool upgrade. It also reminds the user to update the ...

"Uka" is a CG-CA (cybernetic avatar) character model for spoken dialogue systems and avatar communication. You can open/edit/modify this MMD model under CC-BY 4.0 license. This CG avatar has been ...