Known as one of the three largest annual festivals established in Edo period (1603-1868), Fukagawa Hachiman Matsuri is such a popular traditional festival where 300,000 visitors come to see. The highlight of this festival is the parade of people carrying more than 120 Mikochi (portable shrines), and splashing water over the Mikoshi and the streets. 

Fukagawa Hachiman Festival
富岡八幡祭り

 August 11th(Fri) - 15th(Tue) 2017
Location: Tomioka Hachimangu Shrine, Fukagawa, Tokyo

In 2017, the biggest parade is held (This special parade held every 3 years) 

Youtube by Asahi Shinbun - http://youtu.be/zCxM3XBVs6Y

Tomioka Hachimangu Shrine (Japanese web page) http://www.tomiokahachimangu.or.jp/htmls/maturih1.html

Getting there
From Otemachi Subway Station 大手町駅 (Near Tokyo station), take a train on the Tozaisen Subway Line 東西線, then get off at Monzen-nakacho Station. 門前仲町駅 (Travel time 12min.)

3 min. walk to Fukagawa Hachimangu Shrine.