Kenroku-en 兼六園 Garden in Kanazawa 金沢 is thought of as one of the best in Japan.

 Kenroku-en Garden in Kanazawa

Kenroku-en 兼六園 means Six Attributes Garden.  It is one of the Three Great Gardens of Japan.  It was developed from the 1620s to the 1840s.  Kenroku-en contains about 8,750 trees, and 183 species of plants in total.