The event for this festival in 2020 was canceled due to COVID-19
A traditional festival held at Suwa-jinja Shrine at Yanaka. During the festival, about 100 stalls will line the streets next to the shrine.
Suwa-jinja is a historic shrine drawn in Ukiyoe-wood prints by Utagawa Hiroshige, has friendly been called "Osuwa-sama by local people for over hundred years.
Suwa-jinja Reitaisai Festival
August 24th(Sat), 25th(Sun) (and 27th(Mon)*) 2019
Location Suwa-jinja Shrine, Yanaka, Nippori
*On 27th, there is no festival event but a ceremony.
YouTube by taoyakani : https://youtu.be/Z6XLBVMAtXo
3 min walk from JR Nishinippori Station (Upper hill)
8-min walk from JR Nippori station
Google Maps: Suwa-jinja https://goo.gl/maps/t48NBsaKoAE2
Related article on digi-joho Tokyo Travel
Historic neighborhood Yanaka