Folks, I think this is one of the best festivals in Tokyo that is run by a smaller shrine. It has everything the bigger shrines have, without the massive crowds.
To get to the festival, take the Den-en-Toshi line from Shibuya to Futagotamagawa Station (about 10 minutes). Take the West exit and you will see signs everywhere like this:
I take my family every year as, like I said, this is one of the best small shrine festivals in Tokyo
Here is the webpage for the shrine (English available): http://www.setatamagawajinja.jp/index.html
Here is the shrine address: