Opening a postal account

I want to open a postal account with JPBank (http://www.jp-bank.japanpost.jp/). How long do I have to wait to get the cash card? I have a 15-month visa, can I open a saving account?

At first, you must be a registered japanese citizen. Just like all other entities do within the jurisdiction

It's said that it takes about a week to receive cash card. It will be sent to your address by registered mail.
Please consult with post office.

@racersdream
Does questioner need to be japanese citizen?
What she need is an alien registration.
I hear that it's easier to open an account with JP than to open an account with city banks.

Thank you jtomi and racersdream!
I only have the alien card, can I open a saving account with that?

Sorry for late answer.
Probably you can open an account with it. Here is a guidance of a university for international students. See "Off Campus (3)"
http://www.hit-u.ac.jp/eng/ryugaku/newarrivals.html

I suppose it's more better to have a seal because many Japanese system needs it though post office don't require it.

Sorry.
Please see "Off Campus (4)" .
Don't see "Off Campus (3)" .

You can use postal saving card immediately, though other city banks don't allow.

Thank you very much for your answer! I'm going for the account on tuesday, hope it'll work out fine.