A tiny sanctuary of Japanese tradition and nature that's surrounded by towering glass buildings is a great place to relax or walk off a filling Tsukiji sushi breakfast. The land here was originally owned by the Owari branch of the Tokugawa family from Nagoya, and it extended to part of what is now the fish market. When a family member became shogun in 1709, his residence was turned into a palace—with pavilions, ornamental gardens, pine and cherry groves, and duck ponds. The garden became a public park in 1945, although a good portion of it is fenced off as a nature preserve. None of the original buildings have survived, but on the island in the large pond is a reproduction of the pavilion where former U.S. president Ulysses S. Grant and Mrs. Grant had an audience with the emperor Meiji in 1879. The building can now be rented for parties. The stone linings of the saltwater canal work and some of the bridges underwent a restoration project that was completed in 2009. The path to the left as you enter the garden leads to the "river bus" ferry landing, from which you can cruise up the Sumida-gawa to Asakusa. Note that you must pay the admission to the garden even if you're just using the ferry.