Tokyo has many escorts, and many foreigners have fun.

Many foreign tourists use Tokyo escorts as a memory of Japan because Japanese girls provide ecchi sexual service there.
Quite a few agents have photographing as an additional option.

If you flirt with ordinary Japanese girls, it may cause a trouble. An affair is cheating for your partner.
But Fuzoku escorts have nothing troublesome.
You can enjoy as much as you want and say good bye with no string.
It is just business, service. You can use it casually.
Tokyo does not have so many illegal escorts, so you can have adult entertainment safely everywhere.

In-call escorts is good, and you can call in delivery (outcall) service to your home or hotel for adult entertainment.
The latter is rather popular in Tokyo.
You are one-to-one in your home or hotel room. You can receive ecchi sexual service in a relaxing space.