Want to see a lot of Motocycle

I have plan to Japan but need to know the place which i can find and check out the price of Motorcycle.
because my friend love the motorcycle so much.
and they had buy Magazine from japan and found new many model which not sell in our country(Thailand).
where we can see it please advice us

All of Honda, Suzuki and Yamaha own their head offices in Shizuoka Prefecture. Shizuoka & Aichi are Japan's most advanced industrial area. You can join factory tours there.

http://www.pref.shizuoka.jp/a_foreign/english/glance/business.html
http://www.sangyokanko.jp/craftsmanship_english/window.html

..I can't find any information about motorbike factory tours on those links.

Could anyone help me please?