Please note the following information from MasterCard Worldwide:
Since April 19, 2013, cash withdrawals with Maestro Cards in the USA and Japan have been temporarily restricted for security reasons.
At ATMs in tourist areas and cities that are frequented heavily by international clients, cash withdrawals remain possible as usual. Other ATMs in the USA are blocked for international Maestro Cards until October 31, 2014.
All Maestro Card transactions at ATMs are blocked until further notice. Withdrawals with MasterCard credit cards, however, are still possible (except at Seven Bank ATMs). MasterCard recommends carrying a credit card when travelling in Japan during this transitional period.
With the ATM Locator, ATMs that are set up for transactions with cards having chip functionality (search criteria: EMV chip card reader). The accuracy of the information can vary based on the region.
Note: the Locator is currently unavailable for searches in Japan.