Encounter Atlas

Creature index / Lake and sea monsters

Issie

Also called Lake Ikeda monster, Isshii, Japanese Nessie

A humped lake monster said to live in Lake Ikeda, the largest lake on Japan's Kyushu island.

Issie is Japan's best-known lake monster, said to live in Lake Ikeda, a deep volcanic caldera lake near Ibusuki at the southern tip of Kyushu. The name copies Nessie of Loch Ness.

A local tale says Issie was once a white mare who lost her foal and threw herself into the lake in grief, becoming a giant beast that still surfaces looking for it. In 1978 about twenty people said they saw a dark animal with two humps swimming in the lake, and a man named Matsubara took a photograph.

Lake Ikeda is home to very large eels, some around six feet long, which are the most common explanation. Issie is now a local mascot.

What witnesses report

  • Two dark humps moving across the lake
  • A large wake on calm water
  • Something long just below the surface

Famous cases

  1. 1978About twenty people see a two-humped creature; a photo is taken
    Ibusuki, Kagoshima, Japan

Seen the Issie?

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