Visa Information » Japan
The following countries can gain entry to Japan without a visa. Length of stay varies from 30 to 90 days depending on your nationality. 

Andorra, Argentina, Australia, Austria, Bahamas, Barbados, Belgium, Brunei, Bulgaria, Canada, Chile, Costa Rica, Croatia, Cyprus, Czech Rep., Denmark, Dominican Rep., El Salvador, Estonia, Finland, France, Germany, Greece, Guatemala, Honduras, Hong Kong, Hungary, Iceland, Ireland, Israel, Italy, Latvia, Lesotho, Liechtenstein, Lithuania, Luxembourg, Macau, Macedonia, Malta, Mauritius, Mexico, Monaco, Netherlands, New Zealand, Norway, Poland, Portugal, Republic of Korea, Romania, San Marino, Singapore, Slovakia, Slovenia, Spain, Suriname, Sweden, Switzerland, Taiwan, Tunisia, Turkey, U.S.A, United Kingdom and Uruguay 

All foreigners should expect to be photographed, fingerprinted and questioned each and every time they enter Japan. 

Japanese visa exemption rules 

Japanese embassies