Aoyama Cemetery (青山霊園) is located in Aoyama, Minato, not far from Roppongi. The cemetery is famous for its cherry blossoms and many people visit it during hanami season. When I visited, the blossoms were already past their peaks and petals were falling from the trees and covering the tombs and alleys.
Starting at Oji station, I walked on a pedestrian path along the Takinogawa River (滝野川) until I reached Naka-Itabashi station. The path is lined with many cherry trees.
With over 1,000 cherry trees, Shinjuku Gyoen National Garden is one of the best and most popular spots for hanami in Tokyo.
The Oedo Fukagawa Cherry Blossom Festival is held in Fukagawa, in Koto City, east of the Sumida River. The area has large canals lined with many cherry trees. Although I did not get to ride them, boat cruises were available during the festival to see the flowers from a different angle.