It is known that the shogun Tokugawa Ieyasu was coming here, using the pond's water for tea. He also modernized the water supply of the Edo city, selecting the pond's water as source of drinking water and connecting it to the Kanda River.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/60s
ISO Sensitivity: ISO 400