A valid Japanese visa is usually required for entry into the country with the exception of certain countries whose nationals are visa-exempt. Please visit the site of the Ministry of Foreign Affairs of Japan for the latest information on visa applications. http://www.mofa.go.jp/j_info/visit/visa/index.html
A list of countries whose citizens are exempted from obtaining a Japanese visa can be accessed below:
If you need a visa, please contact S. Uye (firstname.lastname@example.org) ahead of time for assistance.