
These ain’t no fortunate stones.
It’s just a little over a year before the grand opening of the 2025 Osaka/Kansai Expo when countries from around the world will come to display the most wondrous of things humanity has to offer. And with the clock ticking, construction work on the artificial island of Yumeshima is swinging into full gear.
Among these plans is one to construct a restroom facility using historic “unfortunate stones” (zannen ishi) at a cost of 63 million yen (US$420,000). Unfortunate stones are stones that were cut and prepared to be used in the wall of a castle, but ultimately were not for any number of reasons such as defects or even being seen as bad luck.
▼ Castle got raided? Blame the stones.
In the case of this restroom, 11 unfortunate stones are planned to be taken from the banks of the Kizu River in Kizugawa City, Kyoto Prefecture. During the reconstruction of Osaka Castle in 1620, stones were transported along this river, but many had fallen along the way.
Fallen stones like these can be seen along many rivers near castles and for the most part they just look like regular stones. However, if you look closely you can see the cut marks and even find serial-number-like engravings in them indicating when, where, and how, they were to be used.
Taking this project at face value, it seems like they’re planning to use ruins dating back centuries just to build a public restroom. And despite making this one of the most educational lavatories around, reaction online has been largely contentious.
“Unfortunate stones are national treasures, so please don’t use them for toilets.”
“How much are they spending on a restroom?!”
“This is unfortunate.”
“A cursed bathroom… Cool.”
“Those stones are really living up to their names.”
“It’s fitting for an unfortunate Expo.”
“If it has historical value, just leave it alone.”
“I think it’s basically a good idea, but I’m more worried about earthquake safety.”
“Aren’t there any better places to use them in the Expo?”
“Japanese people used to believe even stones have spirits. I feel like we’ve lost that.”
“Of course, they tell us now that it’s too late to do anything about it.”
However, it should be noted that these unfortunate stones aren’t quite the pristine artifacts they may seem. They were among the over 60 stones unearthed by chance during work on the riverbank and then just placed off to the side. Years later, they were in the way of a proposed highway, and barely saved then thanks to the effort of Kizugawa City and others.
▼ They’re currently awaiting the final leg of transport in a location in Osaka City.
The architects behind this restroom are hoping to give these unfortunate stones a new purpose as what they call “banzai stones”. In addition to providing the structure of the restroom, it is hoped that they help to raise awareness of other unfortunate stones around the country.
They also plan to keep the stones in exactly the same condition. This is done by scanning the precise shape of each one and then creating a joint that fits them perfectly like caps and holds them in position. The stones will act as pillars with a wooden lattice, similar to the ones used in shrines, placed on top.
There’s also a crowdfunding campaign underway to move these unfortunate stones to Yumeshima in the exact same way it was done 400 years ago, by rolling them on logs.
▼ There are only a few days left in the campaign, so pitch in fast if you’re interested.
After the Expo is finished the stone will either be returned to Kizugawa or put on display somewhere in Osaka in the exact same condition they’ve always been.
It’s certainly a controversial plan, but if the ultimate goal is raising awareness, I can’t think of a better place than a public restroom. That place is going to have thousands upon thousands of people just standing around waiting for friends and family and will read any educational sign you put there just to kill the time.
Source: TV Asahi News, Twitter/@studioon_site, Twitter/@YahooNewsTopics, Campfire
Images: Campfire
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!






The pavilions and public restrooms of the 2025 Osaka-Kansai World Expo
Pikachu, Shinzo Abe, and other Pokémon go to bat for Osaka to host 2025 World Expo
Pocky maker Glico talk about their cellular regeneration breakthrough and new candy at Expo 2025
Starbucks Japan offers special sakura picnics at Reserve Roastery Tokyo beside Meguro River
Mister Donut unveils new sakura doughnuts for cherry blossom season 2026
Fast food sukiyaki: One of the greatest things about autumn/winter in Japan!
Cup Noodle wipes the floor with the competition…at a competition in Japan
Japanese government planning higher ticket prices for foreign tourists at Tokyo National Museum
Starbucks Japan releases a new Cream Puff Frappuccino for a limited time
Step back in time to the Edo period at this unusual highway rest stop in Japan
Visiting Japan’s one-and-only, and only-for-a-limited-time, Dragon Ball noodle restaurant[Photos]
Sento bathhouse gets a new lease on life as a Tokyo cafe and office space
Monkey Majik and Taiiku Okazaki team up for bilingual Japanese-English track【Video】
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
Japan’s cherry blossom season predicted to start earlier than we’d thought, especially in Tokyo
Is Tokyo Station’s startlingly expensive wagyu bento boxed lunch worth its high price?[Taste test]
One Piece creator has hidden secret of anime treasure’s identity in chest at bottom of real-world ocean
Studio Ghibli now sells Ursula’s backpack from Kiki’s Delivery Service at its anime shop in Japan
Silicone testicle covers banned from Japanese sauna following cups being left behind and on shelves
Live-action One Piece’s Luffy teaches Sesame Street’s Elmo a Japanese word for friendship[Video]
Sakura Festival in Chiyoda mixes illuminations, boats, music, and Rilakkuma in the heart of Tokyo
Japan’s newest Shinkansen has no seats…or passengers [Video]
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Naruto and Converse team up for new line of shinobi sneakers[Photos]
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
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