I recently had a chance to try some places in Osaka and Tokyo.
https://kids-jp.com/en/tk/s/
http://lang.dgdgdg.com/top.php
https://en.hi-na.com
All of the above were easy to talk to via email in English. Response times varied as did quality of communication. I would say Independence was the best of the three in terms of speed and system. They have this whole chat system that opens up when you make a booking where you can communicate.
Everyone I met was better looking than their photos and bodies were sometimes leaner than they appeared but I was never disappointed. Most guys had at least enough English to ask simple questions, some could have decent conversations with aid of translator apps.
they all had near identical systems. A house like venue with a discreet protocol where you are taken in so as to avoid other customers. Quite different to the congratulatory shouting you might receive when exiting a bar in Bangkok. You will be charged, thoroughly showered and then festivities begin. All the guys had cheerful personalities and some were even quite quirky or funny. No rude attitudes at all.
Compared to Bangkok, I thought it was very easy and I liked having a ‘menu’ to choose from. Its less fun than a bar but if you’re traveling for other activities and just want easy and discreet fun away from other travel buddies that you can organise from your phone, it’s great. For the quality of service and attractiveness of the guys, I think they’re also very cheap. At least compared to western countries.
Definitely recommend!