Japanese potting media & methods

[theorchidapartment]

I stumbled upon the YouTube channel of what I gather is a monthly Japanese orchid magazine, Engei-Japan and found it interesting to see some of the potting methods and supplies used in Japanese orchid growing.

We've all seen the traditional sphagnum mound neofinetia in the squat pots, but here's a demonstration of the same technique on a Bulbophyllum. And outside of sphagnum moss, it seems like inorganic media is the norm. Maybe ubiquitous in Japanese horticulture because of bonsai...? No bark in sight in any of the videos on the channel!

Obviously these videos don't represent all of Japanese orchid growing, but I am curious if people have dabbled in these methods, media, supplies, or if you've encountered other orchid traditions (so to speak) that aren't as well represented in American and European growing.