The first sign that this is actually a Shinto shrine is given by the red torii and the two komainu guarding the entrance. However, being accustomed to Tokyo's cramped space, I was tempted to consider it just another building constructed very close to a shrine.
But this is a special case, the building is actually part of the shrine. Passing through the torii, after a small corridor, you'll reach the inner shrine, the Tsukudo Shrine, dedicated to Taira no Masakado, the God of samurai.
EXIF info:
Nikon D300
Lens: 12-24mm F/4G
Focal Length: 18mm
Aperture: F/3.5
Shutter Speed: 1/640s
ISO Sensitivity: ISO 200