Kanayama Jinja Shrine is a small shrine within the grounds of the Wakamiya Hachimangu Shrine near Kawasaki Daishi Station. On the first Sun. of April, it holds this now-famous Kanamara Festival nicknamed the Phallus or Fertility Festival.
Festival starts at 11 am. But a large crowd was already there well before that time. Entrance to shrine on the day of the Kanamara Festival. (If you're below age 18, please leave now.)