It kind of hard to see (my camera's zoom is still broken) but if you look very closely, you'll see a bridge over the station platforms.
The bridge connects the three platforms at Tokorozawa Station and people use it to transfer to different train lines.
The station is actually being renovated right now and when it's completed in 2012 there is going to be a new station building above the platforms. So I thought I'd take a photo of this bridge before it's torn down.
Click below for more lovely photos of bridges around the world!