
Twitter users described their hatchlings as gross and enough to make any child cry.
We here at SoraNews24 pride ourselves on keeping up to date with the latest fads and trends on Japanese social media, no matter how out-there they may be.
So when we came across Japanese Twitter’s latest obsession, the Penguin Egg, we were intrigued. Judging it by first appearances, it appears to be one of those children’s toys that grows when you put it in water — seems harmless enough.
What was it about this item that had captivated Japanese netizens so?
People described the penguin egg as gross and enough to make any kid cry, and those words are to us like lightbulbs are to moths, so we knew we had to try it out for ourselves.
The Penguin Egg will cost you 500 yen (US$4.50) and is sold by Hori Shoten, who you may remember are also the company behind the Poop Cakes that were popular a while ago.
The design appears to be modelled after emperor penguins, who can lay eggs around 11 centimeters (4.3 inches) tall, with the toy being around the same height too.
We popped our egg in some tap water, as per the box instructions, and waited.
What would come out of the egg? An adorable little penguin chick? Or, as Twitter insisted, something gross and horrifying?
▼ After 48 hours, the egg started to hatch and we caught our first glimpse of our little penguin baby.
▼ How was this gross? So far it looked incredibly cute! Was Japanese Twitter pulling our leg?
As we topped up the pot of water, as some of it had been absorbed by the egg, the water felt kind of… slimy. Maybe that was part of the miracle of birth, or maybe we were just imagining it.
But when we next came to check on our little penguin offspring, 72 hours since the hatching process had begun, we were met with a disconcerting sight.
▼ Our little baby boy was not so little anymore.
Our dreams of an adorable little penguin chick had been dashed with this buff, body-building penguin. His abs were ripped and his back was glistening. Had he been doing some muscle training while he was in the egg???
Our penguin chick looked so tough, he’d be sure to survive in the wild without his parents. Even a polar bear would be too scared to take him on!
▼ “Do you even lift, bro?”
While we thoroughly enjoyed the wild transformation our penguin baby went through — from delicate egg to the world’s most macho penguin — we can understand how some kids might be, uh, disappointed when their adorable little penguin chick they dreamed of turned into, well, this.
It turned out his whole body was quite muscular, and also quite heavy, as he had absorbed quite a lot of water. It was pretty impressive that our macho boy had managed to fit in the egg in the first place.
And our boy wasn’t the only penguin that had turned out to be unexpectedly creepy — here’s the tweet that started it all:
▼ “It’s so disgusting, I’m crying.”
キモすぎて涙を流してます。 pic.twitter.com/30xVTP4vWA
— リバウンド玉三郎 (@kshioriri) September 4, 2021
However, another Twitter user commented that if you leave the penguin in water for a bit longer, it actually becomes pretty cute!
我が家にもおりますが、もっと膨らむと幾分可愛らしくなってきますので、頑張って育ててください。 pic.twitter.com/0iMzCVukgW
— backseat driver@時差ぼけSSTR2022、CBTR2023 (@nakajya) September 5, 2021
Even though we knew from the get-go that the penguin hatching would end up being something quite disturbing, there was still a lot of fun to be had in the hatching process.
Although now we have no idea what we are going to do with our penguin offspring now that he has hatched. Sign him up to a buff man modelling agency, perhaps?
Photos: ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]










Japanese penguin plushie takes you from egg to chick to adult bird in seconds
We spend 24 hours trying to keep a Tamagotchi alive, it ends up doing something weirder
Our boss becomes the father of a gigantic chocolate egg, raises it with love【Photos】
We tried a Japanese egg steamer to achieve the perfect breakfast eggs without a stove
Japan’s chocolate eggs with Pokémon figures are a compelling argument to eat multiple desserts
Japan now has a “for foreign tourists only” Mt. Fuji sightseeing train[Video]
7-Eleven Japan releases a crazy new viral sandwich: Chocolate Sprinkles and Whipped Cream
Studio Ghibli releases the My Neighbour Totoro tea caddy, with a magical self-closing lid
Japan’s ministry of economy reminds us to “use sound judgment” before buying toilet paper
Sanrio Character Ranking results: Cinnamaroll’s five-year streak broken, poll still goes to dogs
Ramen restaurant in top Tokyo tourist neighborhood skips price gouging, but how does it taste?
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Amazing Pokémon parade with over 30 different species held as World Championships finish【Video】
Four dirt-cheap but tasty places to grab lunch in Tokyo’s Shibuya shopping mecca
Public restrooms in Osaka to get in-stall video screens with ads
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Tokyo government organizes food truck event to clear out delinquent/homeless teen gathering area
Cherry blossoms begin blooming in Japan with record-early starts for sakura season
Nine amazing off-the-beaten-path cherry blossom spots in Japan for yaezakura and shidarezakura
Stunning central Japan wisteria festival is like a purple fantasy straight out of a Ghibli movie
Create a tiny Ghibli anime world on your bookshelf with new miniature papercraft art kits
When will the cherry blossoms reach full bloom in Japan this year?[Forecast]
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
Train station platform ramen store closes its doors on half a century of history in Tokyo
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Nine great places to see spring flowers in Japan, as chosen by travelers (with almost no sakura)
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Studio Ghibli adds new Mother’s Day gift sets to its anime collection in Japan
Virtual idol Hatsune Miku redesigned with look that adds new elements and brings back old ones
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
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
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
We can’t wait for New Horizons, so we pigged out for Japan’s Animal Crossing Choco Egg figures
Never feel lonely in the tub again! We try Japan’s Bobbing Seal floating bath toy【Photos】
We try the bizarre ‘Get Your Finger Chomped By A Sturgeon’ experience at a Hokkaido aquarium