Its' themes were based on the Eidai-bashi bridge-collapsing incident that occurred in 1807 around a place thronged with people for a festival at Tomioka Hachiman-gu Shrine, and on the geisha-killing incident that occurred in 1820 in Fukagawa.
文化(元号)四年(1807)に富岡八幡宮の祭礼でごったがえした付近の永代橋が崩落した事件と、文政三年(1820)に起きた深川の芸者殺しの事件を題材にしている。