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.
Above, cats on Kaminarimon.
Above, Asakusa Shrine.
Above, ema plaque for the festival, showing the legend of how Senso-ji was founded.