Eisa Matsuri is a Bon folk dance that originated in Okinawa to honor the spirit of ancestors, typically performed by younger members of the community. The Shinjuku Eisa Festival is one of the most famous summer events in Tokyo—it has been held annually since 2002 and attracts about one million spectators. The event is held around Shinjuku Station (East Exit side). The main roads are closed to traffic between 10:00-17:00.
Event details are taken from official sources whenever possible. It is always prudent to check the official event website before attending to make sure that there have not been any changes. If you know of an error in the calendar, then please let me know through the contact form.