There are a number of escort websites in English, which obviously cater to Westerners. Expect to pay a premium because of the catering to Westerners (e.g., providers speak some English) and the exchange rate.

kabukicho is the red light district of tokyo.  you will find everything here.  don't have to go anywhere else.

was tough for foreigners when i visited but heard from some people in another forum that said kabukicho loosened up so you can get fuck sessions in alot of the places there now.

also check this tokyo escort guide website.  also, the first one "clubboo" seems legit. some dude PMed me he used that service when he was there.  said the booker spoke good english but the girls spoke jack shit.  good luck.

http://www.tokyopinkguide.com/escorts.asp

-- Modified on 2/13/2011 1:49:41 AM

Absolutely 100% success in Ropongi (near Tokyo). They will pick you up right off the street. I had three girls approach me within 10 minutes of having a beer. American, Russian and a Korean.