Japan is home to intricately designed region-specific manhole covers

Japan is home to the world's only geothermal steam dye workshop

The Hachimantai Geothermal Dyeing Workshop sees artisans and visitors use volcanic steam to fix dyes and add gradations to patterns, creating tie-dyed handkerchiefs and mini-scarves.

Manholes connect underground sewer and water drain pipes

Wherever a portion of sewer is connected to another, a manhole is built. These serve both as access points for maintenance and as connectors for the system. This video shows how crucial manholes are for proper sewer functioning.

Tokyo's transparent toilets use smart, automatic glass to make cleanliness visible

Dubbed the Tokyo Toilet project, this initiative installs restrooms whose walls are transparent when empty, so users can see whether they are clean and safe. When they lock, they turn opaque for privacy. Beyond addressing two key anxieties (hygiene and security), the project lends a distinct architectural prestige to typically banal (and reviled) toilets.

QR codes were developed in Japan in 1994 to fix bar code limitations

These codes store more data than traditional barcodes—up to 1,850 uppercase characters—and can be quickly scanned from any angle thanks to visual indicators like green squares and zebra-striped lines communicating orientation.

Why Japan builds airports on water

Some of Japan's roughly 100 airports are built on water—that is, engineers have created new land in bodies of water specifically to construct airports. This six-minute video explains why the country is doing so despite the higher cost of such airports.

Japan has one of the largest debt-to-GDP ratios among developed countries

On the face of it, this appears to be a bad sign. But a closer look at Japan’s investment strategies reveals that its relatively high debt might be more sustainable than meets the eye.

Japanese Prime Minister Shinzo Abe dressed as Mario at the Olympics

In a 2016 ceremony at that year’s Summer Games in Rio, Abe dressed as Super Mario to celebrate his country hosting the 2020 Olympics. It was a logical move: The character is one of the most recognizable characters in the world and someone who’s now associated with Japanese culture.

Japan has a government office dedicated to tackling loneliness and isolation

The new government office was established in 2021, following the UK's example. It's designed to combat loneliness and the feelings that can proceed suicides. The office's homepage features a chatbot designed to help individuals answer questions and specifically connect with one of 150 support programs.

Japan train station names cat stationmaster

View a gallery of whimsical transmission tower designs from around the world

Despite their importance to the functioning of the electric grid, these structures are often considered aesthetically unpleasant. To remedy this, some have been transformed into art installations featuring stained glass and colorful lighting, or built with whimsical designs, such as clown faces or giant bodies.

Japanese horror is often more psychological than its Western counterpart

One of the country’s most famous directors is Masaki Kobayashi, who won a Special Jury Prize at the 1965 Cannes Film Festival. Unlike his Western peers, Kobayashi’s films avoid jump scares or gratuitous gore, opting instead for slow-burning psychological explorations that are just as terrifying.

Why Amsterdam looks so unique

The Netherlands' capital consists of concentric canals lined with towering, unusually thin row homes, an altogether unique profile in Europe and the world. When it was growing, the city was a key trade hub, and merchants wanted direct access to waterways. Canals were built like roads, and houses were required to be very thin to allow for more homes to line the canals.

Cities and parks often work to prevent graffiti

Although some call it art, many see it as an eyesore and try to prevent it through prohibitive designs, lighting, and vandal-proofed coatings that make spray paint easier to remove. This guide from the Project for Public Spaces outlines some of those strategies and more.

Women in WWII used tattoos to avoid capture

During World War II, Japanese soldiers kidnapped women from Southeast Asian countries and forced them into sexual slavery. But they hesitated to capture married women, a fact that women from the island of Timor exploited, painstakingly poking tattoos onto their bodies that marked them as married women.

Eating KFC is a Christmas tradition in Japan

Since a 1974 marketing campaign, eating KFC on Christmas has become a nationwide custom in Japan. Families place orders weeks in advance, and the holiday accounts for nearly a third of KFC Japan's total yearly sales.

The Australian $5 bill has an image of a bird that glows when exposed to UV light

That’s just one of the many anti-counterfeiting security measures that the Australian government implements on its currency. Popular banknotes from around the world all include their own unique security features—this infographic outlines a few unique ones.

Norway is responsible for salmon sushi

Japanese sushi did not include salmon until the mid-1990s because Pacific salmon was known to contain parasites. Norway, meanwhile, had an abundance of Atlantic salmon, which was safe to eat raw. The country smelled an opportunity and launched Project Japan, which successfully convinced the country that Atlantic salmon was safe to include in its cuisine.

A detailed analysis of romance novel covers through history

A lot has changed in the romance genre over time, a fact that's clearest in the way that the books are marketed to consumers. This interactive data visualization surveyed decades of romance book jackets, finding that raunchy, realistic paintings of scantily clad models have largely been replaced by vibrantly colored illustrations, often with the characters drawn as cartoons.

Colored paint lines on new tires mark different types in the factory

Each stripe helps warehouse workers and distributors identify tire types at a quick glance. This innovation became important a century ago as manufacturers scaled operations and developed distinct product lines.

A catalog of 3,000 ornate Chinese cigarette boxes and brands

China's vast, state-owned tobacco market has produced enough regional brands and packaging variants to sustain a dedicated collector community. Ciggies.app functions as both a product database and an enthusiast social network, with entries spanning current mainland releases, historical discontinued brands, and international imports.

Why is there an archaeologist in my trash can?

Archaeologists have always been interested in rubbish—sites such as waste heaps, middens, and latrines can be some of the richest places to learn about the human past. But the type of rubbish we're leaving behind is changing, and much of it now...

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

The "green men" were among the first European pyrotechnicians

In the 1600s, men wore leaf-covered caps when handling fireworks to protect against sparks. Headgear was also worn by those helping to maintain order when leading medieval fireworks processions, often acting like jesters to entertain viewing audiences.

There are roughly 90 Michelin judges around the world

A major reason the Michelin Guide remains prestigious is the extreme secrecy surrounding its inspectors, sometimes assuming fake names and donning disguises, to ensure ratings are not influenced by special treatment.

One man in Germany answers a large amount of Santa's mail

There are a few places in the world where much of Santa Claus's mail ends up, often because their name includes the jolly man's moniker. One of those places is Nikolausdorf, Germany, where Hubert Weddehage, a local government employee, has responded to Santa's mail for over 50 years.

Joshi is puroresu's female offshoot

Japan’s professional wrestling style, puroresu, has a long history, and joshi, its female variant, is a significant part of it. This documentary provides a primer on joshi and follows two contemporary joshi wrestlers, who detail how they made their way into the industry and its unique culture.

See images of medical cases of firework injuries shared on this 'Instagram for doctors.' (Warning: Graphic content)

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

Massive 3D printers have been used to build homes by stacking layers of 'concrete toothpaste,' a fire-resistant material that effectively insulates against outside noise.

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

An investigation suggests a Scottish island became awash in forever chemicals via seafoam and seaspray—raising questions about what that means for the safety of other coastal areas.

Poison ivy was sent to Europe in the 1600s as an exotic, ornamental oddity, where it was purposefully grown in the English royal gardens at Kew, the Faculty of Medicine in Paris, and a few other locations.

See the 25 of the best photos of auroras from around the world.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

Georgia O'Keeffe's flower paintings are often assumed to be sexual, though the artist claimed she was simply interested in highlighting the beauty of flowers that most people neglect

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

In 1984, Operation Smash Hit intentionally crashed a 239-ton train into a nuclear waste canister at 100 miles per hour to prove the canister's safety, which remained completely intact and lost just 0.29 of its 100 pounds of pressure.

Cultural norms about how to handle the bodies of loved ones in communities in West Africa have hampered Ebola responses.

Sears sold DIY house kits starting at $600 in its famous catalog from 1908 through the 1940s, resulting in roughly 10,000 'Sears and Roebuck houses' being built.

Tattoos remain visible on your skin thanks to immune cells called macrophages

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.