@RachelThornSub There was a time in Linux history where TurboLinux was the default choice for Asia, SUSE for Europe, and RedHat for NA. If you need stable double-byte input I'd stick with RedHat/Fedora for your docs and writing that need long-term predictability.
The problem with Linux distros is that you're never sure of long-term support. The tension is between data portability (longevity) and UI stability.
In your case I might even look to distros from PRC as they'll have Japanese language compatibility buit-in, but then you may have other worries.
@RachelThornSub the Touch desktop layout on Zorin (free version) is a pretty Mac-like UI.
You can see it under Standard layouts here (Donβt ask me why you can only see the free layouts on the Pro site):
Great Distro!