Considering the Laforet Hotel Tokyo in Tokyo?
A VT member wrote the following comment about visiting Tokyo:
Get a mobile phone at the airport by donpaul77
If you are traveling with others, it is a good idea to rent a couple of mobile phones. You can do this right at the airport, and you return the phone there as well. There are several plans to choose from, which are all described in English. I was traveling with two other people, and having the phones was very helpful in getting organized and getting in touch when we got separated (intentionally or not).
Japan has it's own mobile technology, so your American or European phone won't work there (unless you have some sort of uber phone).