Any car shows/Cool events in Japan in the month of April?
 

I have several questions, I'm visiting Japan my first time and i want to at least one car shop or track event.

Where is the REAmeiaya Stop?

Is there any cool race event going ?

What the hell is in Hokkaido, will I miss anything by not going there?

Do they rent cars out? Do I need anything special to do so? How much do they cost?

I'm a nerd, has anybody been to Akihabara? I heard its otaku heaven! ahh! *head explodes*

Thanks!

I plan on arriving in Tokyo in the 9th.