布小熊

I think you mean..... "Tokyo Auto Salon 2010"
Auto Salon is mostly about Mods and tune-ups.
So mod parts companies are the major participates. The cars are modified version.
I heard that more car makers are there too. (Toyota, Nissan...etc)

Tokyo Auto Show is usually every 2 year and it was in 2009..... Major participates are car makers.