I'm off to Tokyo for a couple of weeks and ISO advice on local providers.  Can anyone recommend a reliable info source?  Any suggestions on specific providers?

The situation is different over there in Japan, very.
Be wary of ripoff clubs especially.
Those three sites are helpful and may have a few individual good and recent escorts.
Especially look at http://www.dexterhorn.com/country/asia/japan.htm

Local Japanese sites include:
Clubboo.com/frames/main_girls
Exotica-tokyo.com

There are major cultural and language differences, as if that's not the most obvious observation in the world. LOL

another thread on a tired subject.  there are several good sites with a lot of info.  Try dexterhorn.com, so far the best site i have found.  there are also links there to other sites.