Buying a sim card for 16 days?

We arrive on 15 September and thought we'd get a sim card for use in Japan. Are they easy to get? How expensive are they? Any relevant advice? Thank you!

Buying will be difficult if you are visitor. See http://www.japan-guide.com/e/e2223.html. I always rent a Japanese phone to use with my European sim card.

You must be a Japanese resident to buy a prepaid SIM (or phone), at least by regulation.

Some people says they could buy a prepaid phone only with their foreign passport.

Thank you for the weblink and the advice. Renting a phone will be expensive, so i hope we can find easy to use public phones at railway stations..

We always rent a sim card at the airport. The card works on most 3G phones and they'll test to make sure it works 1st before they'll rent it for you. 107 yen per day + 107 yen per min outgoing calls. All incoming calls are free, incl international calls.