I lived in Japan for almost 8 years. Get her a book called Kana Can Be Easy. That will help her with two of the three alphabets. She'll be able to read menus, train signs, and the simple things.
So far as speaking and listening practice, do some searching for someone who wants to do a language exchange through Yahoo or Skype. Try to find someone around her age as they will be around the same level.
Where's she going in Japan? There was a big exchange program through a language university in north Osaka, but I'm guessing she's probably going to be somewhere near Tokyo.
Have her stock up on cookies and pb cups to pass out to people when she gets there. Also, anything your town may be famous for. The Js love that ####.
Hit me up with any other questions you might have.
You might also want to look into lessons for when she comes back. If she's serious about learning Japanese, she'll be able to pick up tons of comprehension while she is there. The different levels of respect that she'll have to learn give even native Japanese speakers problems, so that will just take a while. Picking up the real alphabet, kanji, takes everyone time.