Where to buy a mountain bicycle?

Hello everybody,
I just arrived two weeks ago in Uji(Kyoto) and would like to buy a mountain bicycle to make some trips in the surrounding however for instance Ihave only seen the ''dutch'' bikes, in general with nearly no derailleur gears. Do you have some tips where could I have a bicycle with derailleur gears? Thank you very much for help! And are there any shops with recycled bicycles?
j.

Tokyu Hands should have some.

I bought my bike at Tokyu Hands(Yokohama). It's a Mongoose with alloy frame, 24 gears, disc brakes. Light as a feather!!

another place to try is "Y's Road"

And Tokyu Hands, do they have some web in english? I can't read the japanese for the moment? And how much did you pay for your bike? Thanks a lot for the answer.

I paid around 35,000yen for mine.

It sounds good, I have to find this shop. Do you know if there is any in Kyoto? Sorry for all these questions!

There's an online shop called Joint that sells bikes, and I think it's located in Kyoto.

link http://item.rakuten.co.jp/joint/

Thanks, I will have a look on the website right now!