I have checked out Rikugien.
Rikugien Garden (六義園, Rikugien) is a Tokyo metropolitan park in the Bunkyo area. The name of the park is composed of kanji that can be easily misread as Rokugien. The name itself comes from the idea of the six elements in waka poetry. The park is composed of a small pond, trees and a hill. The traditional Japanese garden in the park is a tourist attraction.