
You may have thought that the Loch Ness Monster had cornered the market on fresh-water cryptids, but Japan has one of its own mythical lake beasts. There may be a monster lurking in the depths of Kyushu’s Lake Ikeda, a monster who goes by the terrifying name of… Issie-kun.
Lake Ikeda, at just 15 km around and with a maximum depth of 233 meters, is still the largest lake in Kyushu, which just goes to show that there are not that many lakes in Kyushu. It’s a caldera lake, meaning it doesn’t connect to the ocean and depends mostly on precipitation to maintain water levels.
The lake is supposedly also the home of a huge saurian creature called Issie, or Issie-kun, to give him the diminutive male suffix the city seems to prefer. Issie was first spotted by a family in 1978. Twenty witnesses reported seeing some black humps several meters in length moving through the water. Later that same year, a man named Toshiaki Matsuhara caught the creature on film.
▼ It’s Issie! …or some glare on the water. Or maybe some lake weeds? Whatever. Proof!
Since then, the tourism authorities have been promoting the Issie story to attract visitors to the region. There is even a mythology to explain Issie’s creation. In the story, a white mare lived on the shores of the lake with her foal. When the foal was captured by samurai, the white mare leapt into the lake in despair, transforming into a huge water creature. She surfaces now and then to look for her child. There is no explanation as to why Issie is a female in the story, but the monster is generally considered male. Another mystery!
On a completely unrelated note, Lake Ikeda is home to giant eels, some of the largest in the world. They can grow to several meters in length. I’m sure the resemblance to Issie is purely coincidental.
▼Issie looms over a roadside gift shop.
▼ Inside, you can see some captive eels, though none are over a meter.
▼ Even if he knows where Issie is, he ain’t talking.
▼ Some decidedly cuter versions of Issie to dangle from your phone.
▼Or maybe some Issie ice cream?
▼ This kindly Issie watches over the public restroom.
▼This playground looks awfully familiar…
▼ On top, there’s a view point with the three locations of reported Issie sightings marked.
▼ Several identical Issie statues line the shore for photo ops.
▼ Lake Ikeda. What mysteries lie beneath your waves?
If you happen to have any photographic evidence that Issie-kun exists, be sure to drop us a line.
Photos: RocketNews24, La Cite Perdue (Matsuhara photo)












W.T.F. Japan: Top 5 creepiest Japanese animals 【Weird Top Five】
Japan enters Golden Week vacation period, survey shows one in three plan to ride it out at home
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Studio Ghibli releases new anime keychains that are like miniature figurines
Japan’s Mister Donut Japan tries its hand at Taiwanese-style street food donuts
Retro-style Evangelion T-shirts coming to Uniqlo sister brand GU[Photos]
Dorayaki from 89-year-old Japanese confectionery shop is one of the best sweets hidden in Tokyo
Police in Japan summoned to deal with bank intruder…who is also a deer[Video]
Tifa’s Final Fantasy VII bar is going to pop up in real-world Tokyo
War in Iran threatening Japan’s pudding production
Only five branches of Japan’s beef bowl giant Matsuya serve milk shakes, but how do they taste?
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Studio Ghibli launches huge new anime movie T-shirt collection with special design details
Brand-new Square Enix Cafe to open in Tokyo…and in Los Angeles too!
Japanese convenience store gives away free ice cream with creative ad at Shinjuku Station
Hello Kitty is now a transforming truck robot[Photos]
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
Japan’s best conveyor belt sushi restaurant of seven years ago has now, finally, come to Tokyo
Brand-new Pokémon manhole covers coming to help the recovery of a disaster-stricken part of Japan
Japan’s awesomely beautiful Alpen Route snow corridor is now open
Injuries on stairs in Tokyo highlight an overlooked design flaw
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says