Koishikawa Korakuen Garden

The “Oizumi Pond” at the center and many other ponds

in the garden were supplied by the Kanda Aqueduct in the Edo period.

It was rare for an aqueduct to run through a samurai residence,

and traces of it can still be seen at the “Kanda Aqueduct Site” today.

1-6-6 Koraku, Bunkyo-ku, Tokyo

https://www.tokyo-park.or.jp/park/koishikawakorakuen/index.html