Located right next to Tokyo Dome City, Koishikawa korakuen Gardent is one of two surviving Edo period clan gardens in modern Tokyo, and one of the oldest in Tokyo.
The construction was started in 1629 by Tokugawa Yorifusa, and completed by his successor Tokugawa Mitsukuni.
Mitsukuni named this garden “Kōraku-en” (Kōraku means “enjoying afterwards”) after a Chinese teaching of “a governor should worry before people and enjoy after people”.
Kōrakuen was appointed as a special place of scenic beauty and a special historic site based on the cultural properties protection law of Japan. (source: Wikipedia)