it is possible to obtain a loan as a foreigner but you would want to have permanent residence visa or a longer term work visa with a pretty secure job. it is not easy to get one as a foreigner.
Yahoo!
this is where you can see prices. If you can't manage to navigate around this site, which is in Japanese, then you shouldn't be bothering. I'm looking to buy, many years down the track, a place in kansai region so i have been looking just to get a feel for prices.
as said before, how exactly are you planing to stay in Japan? i hope you have some visa's worked out because being a property owner certainly won't be enough.