Participants dressed as Ninjas perform a dance inspired by Ninjas' martial arts at a Ninja festival in Iga, central Japan April 5, 2008. Thousands of ninja enthusiasts have attended the ninja-related events and wandered the town dressed as Ninjas during the annual five-week long festival to promote the city, renowned as one of the hometowns of ninjas, in Japan. REUTERS/Kim Kyung-Hoon (JAPAN)