In the early 1900s, Dr. T. Kenard Thomson proposed increasing NYC's property value by creating a land bridge between Manhattan and Brooklyn, building an island off the Jersey shore, and constructing a "New Manhattan" directly below the old one.

The Aokigahara Forest is the most popular site for suicides in Japan. After the novel Kuroi Jukai was published, in which a young lover commits suicide in the forest, people started taking their own lives there at a rate of 50 to 100 deaths a year. The site holds so many bodies that the Yakuza pays homeless people to sneak into the forest and rob the corpses. The authorities sweep for bodies only on an annual basis, as the forest sits at the base of Mt. Fuji and is too dense to patrol more frequently.