Can I buy Japanese Kobo and use English on it?

Hi all:

I am going to osaka for a holiday in 2 weeks time, and I was thinking of buying the new Kobo Glo (or the Kindle Paperwhite) while in Osaka, with a BIG IF (if i can even find any store having it in stock!).

So, what I would like to ask is, is the Japanese version of the Kobo e-readers (I know currently Kobo Touch is on sale in Japan), any different from the international version? Is there a setting to set the entire firmware to show menus and settings and ebooks in English instead of localized Japanese?

I read only english ebooks, and would like to be able to navigate through the menus and the ebook in english..

Also, are firmware updates for the Japanese Kobo e-reader the same as international ones? or do they release a firmware specifically for the japanese sets?

Thanks for your help!

Any help would be appreciated. thanks!