Tokyo Motor Show 2013

I'm going to be in Tokyo during the 43rd Tokyo Motor Show this November (lucky me!) and I'm wondering if I should book a ticket in advance or if it will be okay to just turn up on the day?
I've seen that you can do both but I don't want to risk disappointment with it being sold out on the day (I'm going on the 28th which is a Thursday)

If you do advise to book in advance is there a way that I could book tickets while abroad?

Thanks :)

http://www.tokyo-motorshow.com/en/
http://www.tokyo-motorshow.com/en/outline/index.html

Sales detail info yet.
Check again one month before.
Tickets not be sold out. Don't worry :D

But Weekday over 65,000 visitors per day
Weekend over 100,000 visitors per day
especialy stage performance very very crowed XD

You can just go on the day. Tickets don't sell out, especially on a Thursday.