I have a problem with Japanese characters inside some windows in Windows 8.1. They appear as too small and unreadable for me. The OS itself was in a different language for a long time, only just a while ago I switched to Japanese.
I did some testing and installed an English Windows 8.1 in a virtual machine, and then switched it to Japanese. Here are the results:
I looked up the strings in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes (as I've seen elsewhere) but all of them were identical. I've reinstalled the affected programs on the host machine but nothing changed.
I have of course changed all the locale settings like the default encoding, region to Japanese.
This problem occurs only with some software (like Anki and VirtualBox) but it makes some longer texts highly uncomfortable to read or unreadable.

