It's a great place to go for a stroll, with a great view over Tokyo from the Big-O Ferris Wheel or from the Skyflower parachute (the green pole on the right of the image).
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/20s
ISO Sensitivity: ISO 1000