The actor page for him displays his name fine.
Unfortunately I can’t report this to the source, because I have no idea where you are getting this name printing from. It’s not on theTVDB or TMDB.
I have this show in two libraries, btw. Here’s how it looks in the other that I have not updated:
Just tried another metadata refresh on the show I originally started this topic for, and the name has corrected now. Also checked the second that Mikako Komatsu was starring in and her name also restored to normal with a refresh.
Not sure if Plex had a hand in this, since no reply here and possible the provider had already resolved it and the change was just propagating through considering the turnaround, but thanks if you did.