Julius isn’t that widely known and unfortunately a lot of his recorded work is out of print. I researched his work for my Masters (2006-2009) and my mentor, German-Canadian sound artist, Robin Minard had a vast archive of Julius’ work, which I promptly ripped to mp3 when I was in Germany during 2008. I also found two books on his practice, which I treasure to this day. An incredible, important artist.
Yoshimura and the Youtube reference is interesting since the rediscovery of his (other many others) work are due to the weirdness of the YouTube algorithms, which - for reasons mostly unknown - started ‘recommending’ Japanese ambient (‘Kankyo Ongaku’) to users en masse, around the time that you’re suggesting. I know it was certainly the case for me too! I think maybe that @disquiet wrote or commented on this phenomenon at some point?
And New Age, yep - there’s something about it right now. The US duo, Visible Cloaks have been mining the genre in interesting ways for a few years now. I think a great deal of the attraction to Kankyo Ongaku’s sound is its subtlety and considered (restrained) approach. Some of it can be pretty cheesy, but Yoshimura’s work - especially 1986’s Green album - is absolutely stunning.