NTT Communications has activated the first two vending machines to sell “Prepaid SIM for Japan” (Prepaid SIM) cards for short-term business travelers and tourists in two locations in Japan.
The first two locations are AQUA CITY ODAIBA and New Kansai International Airport. The carrier is currently offering 7-day and 14-day prepaid mobile data packages with nationwide (Japan) coverage. Wi-Fi coverage at 95,000 hotspots operated by NTT Broadband is also included.
http://service.ocn.ne.jp/mobile/one/visitor/en/index.html