Later the land was owned by Zenjiro Yasuda who granted it to the public after his death in 1922. Unfortunately it was destroyed by the Great Kanto Earthquake of 1923, but was renovated afterwards and opened as a park in 1927. Post WWII development polluted the Sumida River and the grounds of the garden were greatly affected, but they were restored again in 1971. Unlike most of the gardens around Tokyo, Kyu Yasuda Garden is a public park and admission is free. That said, I wouldn't recommend going out of my way to visit it. It is nice, but it is small and not so special. However, if you are visiting the Edo-Tokyo Museum or going to a Sumo tournament and you want to eat a picnic lunch outdoors, this is the spot.
Address: 12 Yokoami, Sumida-ku (Just behind Ryogoku Station).
Open everyday 9:30 - 16:30. Closed Dec 29 - Jan 1.