I'm new ,and this is a place I can post!
I spent almost two weeks in Shibuya, and I didn't even touch the surface. The whole "if you don't speak Japanese, it's a terrible place for mongering" regime is dead. They gladly welcome foreigners (although I'm white, I can't speak to others), and I am going back soon just to enjoy the amazing women there.
Shinjuku Max, for example, I had no problem getting set up, and they put with a fucking sex goddess Miyuki who spoke really good english and gave service at a level I have not had in the US. You will pay a gaijin tax but 90 min was around $230 I believe.
https://www.max-s.com/top/schedule/
Also, I know Shinjuku, Taito, and Shibuya have lots of low cost love hotels. You just find and escort service, she sets up a hotel, and you can take her there for as long as you want.
I didn't even scratch the surface when I was there, but Japan has a great sex culture, and all the girls I saw were fucking goddesses. You'll never forget a nuru session with a LA 9.