This is a footbridge over a large road called Koshu Kaido. It is connected to a part of Shinjuku Station's south exit and crosses over to Shinjuku Southern Terrace, which has a lot of shops and restaurants.
This section of Koshu Kaido is actually also a bridge that crosses over train lines that run below it. Approximately 60,000 cars and 140,000 people use this street everyday, which was built in 1925.
Tokyo National Highway Office has started a big project to renew this whole area for not only safety reasons but to reduce traffic and to make it more convenient for pedestrians. It is due to be completed sometime around 2015. (If anyone is interested, you can see the footbridge and the construction area on youtube here.)
Click below for more photos of wonderful bridges around the world!
