Danny Choo experienced the aftermath of a train suicide the other day from right up close, and posted this haunting video of the cleanup. This happens reasonably often here in T-town, and probably stops the Yamanote line (the line that circles around Tokyo) about as much as anything else. As Danny says:
"99% of these cases are of people jumping in the tracks and most of the jumping happens before or after work - it was about 5 in the evening."
Here's the video: