Gokage hats

A Five Kage Summit (五影会談, Gokage Kaidan, Literally meaning: Five Shadow Summit) is a meeting of all the Kage to discuss matters affecting their respective countries and the world at large. When a Kage wishes to meet with his or her fellow Kage, he notifies the others of a time and place to convene as well as how many bodyguards they may bring. Travel and mission restrictions are placed on all shinobi who will not be attending the meeting in the days before, during, and after so that no village can work against another while their Kage are gone.