... BBC's long term Japan correspondent wrote an article about it when he finally left, and I'm pretty sure he's fluent.
I wouldn'y be too sure about being fluent part. I am an Indian and I have seen bulk of so called indologists (professors in American and European academia) unable to pronounce common sanskrit words - despite writing bestsellers on the subject.
That special milk ( sh.itjust.works )
Chad VLC ( lemm.ee )
Biden calls US ally Japan ‘xenophobic’ along with Russia and China ( www.cnn.com )