There are some nationalities that are not even permitted entry to North Korea. South Koreans are not permitted entry and there have been reports of difficulties regarding Israeli, American, British and Japanese nationals. However, in January 2010, North Korea lifted the restrictions on American citizens who are now free to visit at any time of the year. If you are a U.S. passport holder, be aware you must have special validation for travel to North Korea from the Department of State. A specialist North Korean travel agency can help you sort out the complex and ever-changing regulations.