A giant penis on parade to pray for fertility.
http://notesofnomads.com/kanamara-penis-festival-japan/
Quote: The first Sunday in April marks the celebration of the Shinto fertility festival, the Kanamara Matsuri or the “Festival of the Steel Phallus.” Known colloquially as the “Penis Festival”, these festivities celebrate just that: the power of the humble penis. And it is an event that is gaining increasing popularity, especially among foreign visitors, each year.
http://notesofnomads.com/kanamara-penis-festival-japan/