This small stroll garden is an oasis in a concrete jungle and is supposed to be the oldest extant garden in in Tokyo. Tokugawa Ietsuna, the fourth Tokugawa shogun, gave to land here to Okubo Tadatomo. Construction of a garden began in 1678 and continued for centuries. It became the 'Shiba-Rikyu' gardens in 1875. The site is designed around a large pond which may have originally contained sea water. The pond includes two small islands, Oshima and Horai-jima, which are connected to the shore via footbridges.
The garden is located next to the bus Hamamatsucho Station on the JR Yamanote-sen. You can get a bird's eye view of the garden from atop the World Trade Centre Building. To get up there, buy a ticket for the elevator on the first floor of the building.