Seriously thinking of going over to japan for a week bout this time next year for some fun....starting to save now....

Just got a few questions.....

Whats the deal with lisences over there and where do i go to get an internationally recognised one because wanna get a hire car to strap round......

What cities and suburbs would be the best to visit?? any tuning houses?? Race tracks to take the hire car on?????haha

and any tips or advice for travelling there would be sweet as.....

Cheers