Perhaps one of the most under-rated Japanese traditional gardens in Tokyo, Kiyosumi Garden is a beauty of a park in Eastern Tokyo. Originally the property of an Edo period merchant family, it became a public park in 1932. Kiyosumi gardens best feature are its plentiful landscape rocks, highly valued in Japanese landscaping. Many of these rocks are used to form pathways, some of them right over the water features where you can look down and enjoy the large koi and curious turtles swimming up beside you. The pond features Ryotei, a teahouse (reservations required) sitting above the water and a hillside where regional flowers bloom.