You are going to have an interesting experience for sure...tons of hot looking girls over there. I would start researching the laws over there regarding photos. Also Tokyo would be the place to go since most of the hostess clubs are over there.
http://www.tokyoreporter.com/2009/04...test-av-stars/
You might want to also make some connections on myspace.com or if you had a japanese translater mixi.jp (basically myspace of japan)
I wore my glasses for 2 weeks over there in october so my wife who is japanese wont catch me checking out the girls. I did get a bunch of adult magazines...all in japanese though. there is a ton of adult companies out there. This one was popular
http://www.ideapocket.com
try contacting the phone listed in the whois, they should have someone who can speak some english.
http://who.godaddy.com/WhoIs.aspx?do...rog_id=godaddy
post if you need more adult websites that are in japan, the magazine seems to list websites with most of the layouts.
Also if your in california you should be able to find a japanese bookstore they will have adult magazines from Japan, unfortunatley right next to the kids anime magazines.