The transcript reads:
Tim Ferriss: So, different uses, to be used sparingly or all the time, in case of K. Rose. And we are at Adaia, as the name of the place. And if you hear any waterfall-like sounds in the background, that is because we have a natural onsen bringing water into the rooms where there are wooden tubs that are effectively indoor/outdoor. There’s an open wall so, you look out into a forest/hillside, and the steam pours out into the great outdoors. It is winter so, there’s tons of fog and mist and so, on; it’s just a magical place.
Kevin Rose: It’s absolutely beautiful. One of the reasons I chose this place to stay is one, I had never stayed in a ryokan, like a traditional Japanese house before and I always wanted to do that.
I don't think the description can fit many places because I don't think there are many Ryokan that all tick the following boxes:
- Natural Onsen bringing water into the room
- Half indoor/outdoor tubs
- Open wall to forest/hillside
I think the spelling
Adaia is not correct. I found a couple with the spelling
Otaya (e.g. https://www.booking.com/hotel/jp/ryokan-otaya.de.html ) but neither seemed to be a good fit, because it isn't near a forest/hillside and also does not seem to have private in-room Onsens.