Implement "System Layout" (as in Ai) in the Character's Panel
Using Adobe Fonts such as Source Han Sans seemed very tempting. But with Japanese, I've found that the self-contained space Japanese period and comma are supposed to have after them, disappears. Something similar happens with spaces which are way smaller than they should be.
Looking around I saw Adobe Illustration has an option named "System Layout" in the Character's Panel that by ticking it the issue gets automatically solved. It'd be great to implement this, and not only for Japanese but I'm sure it will be nice for Chinese and any other typeface with similar issues.