Aohkigahara Forest west of Tokyo at the base of Mount Fuji is also known as the "suicide forest." According to Wikipedia, it's the second most popular suicide spot after San Francisco's Golden Gate Bridge. From CNN:
Japan's suicide rate, already one of the world's highest, has increased with the recent economic downturn. There were 2,645 suicides recorded in January 2009, a 15 percent increase from the 2,305 for January 2008, according to the Japanese governmentDesperate Japanese head to 'suicide forest' (Thanks, Ed Szylko!)
Local authorities, saying they are the last resort to stop people from killing themselves in the forest, have posted security cameras at the entrances of the forest.
The goal, said Imasa Watanabe of the Yamanashi Prefectural Government is to track the people who walk into the forest. Watanabe fears more suicidal visitors will arrive in the coming weeks.