All visitors to Japan are required to have a valid passport.
Nationals of many countries are able to enter Japan without a visa. However, some nationals of certain countries may be required to obtain a visa. If you are not certain whether you need a visa, please consult with local Japanese Embassy or Consulate in your region, or visit the website of Ministry of Foreign Affairs of Japan.
http://www.mofa.go.jp/j_info/visit/visa/index.html
Japan time is +9 hours from GMT, +14 hours from EMT and +17 hours from PST.
Japan observes no daylight saving time.
