The Hanau epe (also, hanau eepe: supposed to mean "Long-ears") were a semi-legendary people who are said to have lived in Easter Island, where they came into conflict with another people known as the Hanau momoko or "short-ears". A decisive battle occurred which led to the defeat and extermination of the Hanau epe. According to the legend, these events are supposed to have happened at some point between the 16th and 18th centuries, probably in the late 17th century.
The historical facts, if any, behind this story are disputed. Since the victorious "Hanau momoko" are usually assumed to be the surviving Polynesian population, there has been much speculation about the identity of the vanished Hanau epe. Various theories have been put forward, most notably Thor Heyerdahl's claim that they were ancient migrants from Peru who were the original occupants of the island and the creators of its famous stone monuments.
Heyerdahl's theories have not received much support among modern scholars, many of whom doubt whether the events described in the story ever took place. It has also been argued that the traditional designations of "long ears" and "short ears" derive from a misinterpretation of similar-sounding words meaning "stocky" and "slim" peoples.
There are two legends about how the Hanau epe reached Easter Island. The first is that they arrived some time after the local Polynesians and tried to enslave them. However, some earlier accounts place the Hanau epe as the original inhabitants, and the Polynesians as later immigrants from Rapa Iti. Alternatively, the "epe" and "momoku" may simply have been two groups or factions within the Polynesian population. One version states that both groups originated from the original crews of the Polynesian leader Hotu Matua, who founded the settlement on Easter island.
The story states that the two groups lived in harmony until a conflict arose. The source of the conflict varies in different tellings or retellings of the legend. The Hanau epe were soon overwhelmed by the Hanau momoko, and were forced to retreat, taking refuge in a corner of the island near Poike, protected by a long ditch, which they turned into a firewall. They intended to kill the Hanau momoko by burning them in the fire-ditch. The Hanau momoko found a way round the ditch, attacking the Hanau epe from behind, and pushing them into their own inferno. All but two of the Hanau epe were killed and were buried in the ditch. The two escaped to a cave, at which one was found and killed, leaving only one survivor. The ditch was thereafter known as Ko Te Umu O Te Hanau Eepe (the Hanau Eepe's Oven).