Where can I buy a Konro portable BBQ?

Hi, I will be in Japan for 2 weeks, travelling in Tokyo and Kansai.

Have a look at these BBQs...

http://www.chefsarmoury.com/bbq-39-s-grills-and-accessories/cat_78.htm...

Where can I find similar in Japan? They are very expensive here, so hoping to buy it cheaper there.

go Kappabashi[合羽橋/かっぱ橋] in Tokyo near Asakusa/Ueno.
http://youtu.be/W0arKO58Bwg
or Sen-nichi-mae[千日前] in Osaka near Namba.
http://youtu.be/_xkEGp6pDTo

This Konro calling "Shichi-rin[七輪]".
http://en.wikipedia.org/wiki/Shichirin
Japanese online shoping site around 10,000Y. ex)
http://store.shopping.yahoo.co.jp/scot/b3d1b7bfbc.html

but Shichi-rin is not light weight.
if small type over 5kg(380x220x170mm).
ex)
http://7rin.biz/goods/cat19/cat22/

Thank you, very helpful.