Do you know the most popular suicide location in the world? It's San Francisco's Golden Gate Bridge. And in the Golden Gate Bridge, people chose point 69.
And the next place is? It's Aokigahara in Japan, it's called a suicide forest. Today I found this article "Desperate Japanese head to 'suicide forest'" in CNN. Aokigahara is a famous forest near Mt.Fuji, basically it is a beautiful place for walking and camping. Since there a lot of guide boards and trails, it's no problem to go around. However if youdeviate from the trails, it will be hard to go back where you were. Many people believe that a compass doesn't work in Aokigahara because the forest is on lava, including the magnetic material of Mt.Fuji. But it's superstition, a compass can work there. So the important part is you should walk on trails and take a compass and map always.
But it is true many people decide to die there. The really scary thing is if you walk on non-trail parts, you may find a dead body easily. A person who wants to die will choose a place where nobody will come soon, but someone will find his dead body finally. This is a little bit old date though, they said in 2003, 100 dead bodies were found in Aokigahara. Some said Aokigahara became a suicide spot because of a book of bestselling suspense author Seicho Matsumoto. In his novel "A tower of wave" published in 1960, central characters committed suicide in Aokigahara. (Of his novels, I recommend "castle of sand" Here are some videos of Aokigahara on YouTube, some look shocking, watch out. (I can't open it, scary.)
In this wiki's world suicide spots list, there is no Aokiigahara. (I don't know why, because it's the no. 2 place). Except for Aokigahara, Chuo line in Tokyo and Tojinbo in Ishikawa are famous places for suicide.