Prepaid Cell Phone Struggles

Hi!
I'm going to Japan for four months in April and although I will be travelling with friends, I also wanted to be able to explore a bit on my own, which to me meant getting a device and plan that would enable me to use google maps or a similar feature.

So, my plan is to buy this cell phone:
http://www.kyoex.com/docomo-panasonic-p-01d-my-fit/
an unlocked docomo panasonic p01d, which has android os (google maps too)

and use this sim card in it:
http://www.bmobile.ne.jp/sim_t1gb/index.html
a bmobile card that will enable me to use a gig of data and talk

My questions are:
1. Does this seem like a good idea?
2. I won't be able to send or receive text messages on this setup, I don't think. Are there any alternatives that will enable me to send/receive text messages?
3. Can I get a bmobile sim card on a student visa?

1. Does this seem like a good idea?

Tourists can't get prepaid sim's with voice, so you may be limited to one of the data only offerings unless you have some sort of resident visa.

2. I won't be able to send or receive text messages on this setup, I don't think. Are there any alternatives that will enable me to send/receive text messages?

I think you can set up text/email but sms is a different issue. Either way there are plenty of other options: skype, talkatone, email

3. Can I get a bmobile sim card on a student visa?

Yes, and if you are on a student visa you will be able to get one of the talking sims.

Sorry, I forgot to mention that I will be on a student visa while I'm there.

To the person who posted above, jut so we're clear, I would be able to send/receive text messages?

Yes, it is possible to send/receive text messages (both sms and email). I can't recall if it is natively supported by the sim, but there are plenty of apps available that send these via data instead.