Passport validity:
Duration of intended period of stay
Blank passport pages:
One page required for entry stamp
Tourist visa required:
Not required for stays of less than 90 days
Vaccinations:
None
Currency restrictions for entry: Amounts equivalent to ¥1,000,000 or above subject to declaration
Currency restrictions for exit:
Amounts equivalent to ¥1,000,000 or above subject to declaration
Source : travel.state.gov