Koenji Awa-Odori (2015)
Time Out says
Around 10,000 dancers pile out on to the streets of Koenji over the two days of the annual Awa-Odori, undoubtedly one of Tokyo's most energetic festivals – and one with crowds to match. The awa-odori ('awa dance') tradition can be traced back to Tokushima in Shikoku, where the story goes that the local daimyo plied his citizens with booze to celebrate the completion of the local castle in 1586, leading to a citywide outbreak of dancing in the streets. Whatever the accuracy of that tale, the enthusiasm was contagious, and Koenji has been holding a dance of its own since 1957. While the action starts at 5pm, you'll need to arrive much earlier if you want to snag one of the best viewing spots.