Kachidoki Bashi is the last bridge over Sumida River, before it flows into Tokyo Bay. It was built in 1940, to commemorate a victory of the Japanese army during the Russo-Japanese War. It is the only drawbridge on the Sumida, but it hasn't been raised since 1970...
Behind the bridge you can see the Tsukishima island and on center-left, the grey building is the St. Luke's Tower, the tenth tallest skyscraper in Tokyo.
EXIF info:
Nikon D300
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/7.1
Shutter Speed: 1/1600s
ISO Sensitivity: ISO 200