
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】
Rakuten randomly offers 58 New Year’s osechi feasts in Japan, but did we get a star or a dud?
Four Shinto shrines to pray for love at in Japan to start the New Year
Japanese beef bowl chain Sukiya’s 2026 Smile Box lucky bag basically pays for itself
We revisited Sweets Paradise after a decade to see if Japan’s dessert buffet still delivers
Majority of Japanese mayors say foreign residents are essential but most see good and bad effects
Survey finds more than 70 percent of Japanese children have an online friend
Japan’s otoshidama tradition of giving kids money at New Year’s gets a social welfare upgrade
A diner’s guide to oden: Japan’s weird-looking, super-popular winter dish
Godzilla-shaped ice cream on sale in Tokyo near the sight his most adorable rampage
We drank crab-juice infused Crab Cola from Niigata Prefecture, because why not
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
Hayao Miyazaki says Happy New Year to Studio Ghibli fans with new art for Year of the Horse
We found possibly the quietest Japanese-style hotel in Tokyo’s bustling Shinjuku district
Cup Noodle tries an authentic Jiro-style ramen, but something’s not quite right
The best Starbucks Japan Frappuccinos we want to drink again in 2026
That time Seiji called JASRAC to ask why he didn’t get paid royalties for his song being on TV
Japan’s oldest largetooth sawfish in captivity back on display in Mie Prefecture
Pizza Hut Japan’s hot lucky bags are perfect for a New Year’s pizza party
7-Eleven Japan starts new temporary luggage storage service in over 300 branches
Disillusionment at Tsukiji’s tourist-target prices led us to a great ramen restaurant in Tokyo
Starbucks teams up with 166-year-old Kyoto doll maker for Year of the Horse decorations【Photos】
Tokyo considering law requiring more trash cans following litter increase in heavily touristed area
Tokyo’s Tsukiji sushi neighborhood asks tour groups to stay away for the rest of the month
Tokyo event lets you travel back in time, for free, to celebrate 100 years since Showa era start
Japan may add Japanese language proficiency, lifestyle classes to permanent foreign resident requirements
Sanrio theme park in Japan announces plans to expand into a Sanrio resort
Stamina-destroying “Paralysis Noodles” are Tokyo’s newest over-the-top ramen innovation
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
Japan’s deadliest food claims more victims, but why do people keep eating it for New Year’s?
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
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
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
Leave a Reply