Annecy Paysages is an open-air art festival taking place in the center of Annecy this summer, until the beginning of September. Here is a map of all the artworks. There are a few events outside the city as well.
Gojoten Jinja (五条天神社) is a shinto shrine located inside Ueno Park. It holds its annual festival in May. In 2014, it was at the same time as the Yushima Tenmangu shrine festival: I was walking away from that festival when I saw another mikoshi parade just across Chuo Dori.
Hanazono Jinja (花園神社) is a shinto shrine in Shinjuku, right next to Kabukicho. It holds its annual festival in May. As usual in Japanese festivals, there are many food and game stalls on the grounds of the shrine, while the mikoshi are paraded around the neighbourhood.
Sanja Matsuri is a festival held in Asakusa every year in May. It celebrates the three people involved in the creation of Senso-ji and later enshrined as Shinto kami in Asakusa Shrine, next to the temple. It is one of the biggest festivals in Tokyo, with about 100 mikoshi (portable shrines) paraded around the neighbourhood.
The Asakusa Culture Tourist Information Center is a modern building located in front of the Kaminarimon Gate of Senso-ji, in Asakusa. The top floor has a cafe, as well as a freely accessible observatory with a great view on Senso-ji and Tokyo Skytree.