Japan’s Landmark Capsules Coming Down to Sit in Museums

Demolition teams start to take down the Nakagin Capsule Tower, an iconic structure designed by Japanese architect Kisho Kurokawa and built in 1972, in Tokyo's Ginza district on April 12, 2022. (AP)
Demolition teams start to take down the Nakagin Capsule Tower, an iconic structure designed by Japanese architect Kisho Kurokawa and built in 1972, in Tokyo's Ginza district on April 12, 2022. (AP)
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Japan’s Landmark Capsules Coming Down to Sit in Museums

Demolition teams start to take down the Nakagin Capsule Tower, an iconic structure designed by Japanese architect Kisho Kurokawa and built in 1972, in Tokyo's Ginza district on April 12, 2022. (AP)
Demolition teams start to take down the Nakagin Capsule Tower, an iconic structure designed by Japanese architect Kisho Kurokawa and built in 1972, in Tokyo's Ginza district on April 12, 2022. (AP)

Nakagin Capsule Tower, a building tucked away in a corner of downtown Tokyo that is made up of boxes stacked on top of each other, is an avant-garde honeycomb of science-fiction-era housing long admired as a masterpiece.

It’s now being demolished in a careful process that includes preserving some of its 140 capsules, to be shipped to museums around the world.

Preparations have been going on for months to clear the surrounding areas, for safely dismantling the landmark near Ginza. The first capsule will be removed in the next few weeks.

Built in 1972, the 13-floor building embodies the so-called "metabolism" vision of its architect Kisho Kurokawa: The idea that cities and buildings are always changing, reflecting life, in rhythm with the human body.

"No one exists divorced from the thoughts of those around him. All comes into existence through an assembly of causes. All things are interrelated. In accord with this principle, it is our aim to build an ideal world, step by step," Kurokawa wrote in his 1994 book, "Philosophy of Symbiosis."

Kurokawa died in 2007, at 73.

Although striking in appearance and concept, the building outlived modern construction guidelines and needed to be torn down.

Skyscrapers have popped up nearby, dwarfing Nakagin. A developer took over the property in 2021.

Tatsuyuki Maeda, who started using Nakagin as a second home in 2010, said he simply loved being in that 2.5 meter (8.2 foot) wide space, so tiny but cozy it felt like a child’s hideaway. And it got his creative juices going, he said.

"The view from that round window felt so good. At night, when cars sped by, their lights on the nearby freeway were pretty. And the cityscape was beautiful," Maeda said.

Appliances and shelves are built into the walls. A desk pops out in one section. In another is a Sony reel-to-reel tape recorder, state-of-the-art electronics of the 1970s that’s historical memorabilia now like the building itself.

Only about a third of Nakagin's residents lived there full-time in recent years. Most used it as offices and workspaces. They tended to be creative people, musicians, filmmakers and architects, as though it drew people sharing similar values.

Maeda, who does public relations work, owned 15 capsules, mainly to have a say in the building’s fate, and had rented some of them out. Residents would party together, he recalled.

He and others had been working together since 2014 to save Nakagin, first to prevent its destruction and rebuild it, but eventually to hand down its legacy as an artwork. The project raised money through crowd-funding and put out a book, complete with photos, in March, titled, "Nakagin Capsule Tower: The Last Record."

The preservation project calls for some of the capsules to allow for real-life living in a separate locale. Those in museums will be refinished by the Kurokawa architectural office, which went over the original designs to figure out how each box could be detached with minimal damage, a feat especially difficult in the crowded Ginza area.

Will Gardner, a Swarthmore College professor whose specialty is Japanese modernism, says the metabolist movement had its "moment" of recognition for its organic approach to Tokyo’s 20th Century urban-planning problems, such as over-crowding and a lack of infrastructure.

It was an era when Japan was rebuilding from the ruins of World War II, undergoing rapid economic growth, buzzing with creative energy and trying to define itself.

But metabolist designs did not win wide acceptance among real estate developers, construction companies or consumers, who all turned to more conservative prefabricated housing, said Gardner, who wrote "The Metabolist Imagination: Visions of the City in Postwar Japanese Architecture and Science Fiction."

"This was a generation of architects that came out in this era when everything had been destroyed. But at the same time there was a lot of dynamism, and the economy was on the rebound, and there seemed to be a moment when this big vision could really thrive," he said.

"For a lot of reasons, today’s Japan is very different."

Kurokawa was heavily influenced by Kenzo Tange, who designed the Yoyogi National Gymnasium, built for the 1964 Tokyo Olympics. An art museum in Tokyo’s Roppongi that looks like a waving wall of glass, which opened in 2007, and the 1999 new wing of the Van Gogh Museum in Amsterdam were designed by Kurokawa.

Nakagin was one of his early pieces. Its defiantly repetitive motif both celebrated and challenged mass production, appealing to individuals, especially those lost in conformist Japan.

Kurokawa developed the technology to install the units into a concrete core shaft with four high-tension bolts. The capsules were designed to be detachable and changed to new ones, or recycled, every 25 years.

That never happened.

Instead, after 50 years, the pieces are coming apart.

Kurokawa used to say that, long after his buildings were gone, his thinking would live on.

Kurokawa’s designs address sustainability and social accountability, said Tomohiro Fujisawa of Kisho Kurokawa Architect and Associates, issues that remain urgent today.

"The world maybe has finally caught up with him," Fujisawa said.



After Spain’s Blackout, Questions About Renewable Energy Are Back 

People wait outside a closed metro station, during a blackout in Barcelona, Spain, Monday, April 28, 2025. (AP)
People wait outside a closed metro station, during a blackout in Barcelona, Spain, Monday, April 28, 2025. (AP)
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After Spain’s Blackout, Questions About Renewable Energy Are Back 

People wait outside a closed metro station, during a blackout in Barcelona, Spain, Monday, April 28, 2025. (AP)
People wait outside a closed metro station, during a blackout in Barcelona, Spain, Monday, April 28, 2025. (AP)

The massive power outage that hit the Iberian peninsula on April 28 has reignited a debate in Spain over the country's plan to phase out its nuclear reactors as it generates more power with renewable energy.

As people wait for answers about what caused the historic power cut, which abruptly disrupted tens of millions of lives, some are questioning the wisdom of decommissioning nuclear reactors that provide a stable, if controversial, form of energy compared to renewables, whose output can be intermittent.

Spanish Prime Minister Pedro Sánchez has rejected such criticism, asking for patience while the government investigates what caused the grid's disconnection. He said that his government would not "deviate a single millimeter" from its energy transition plans.

Here’s what to know about the energy debate:

What is nuclear power and why is it controversial? Nuclear power is a zero-carbon energy source formed from nuclear fission, when the nuclei of atoms are split into two or several parts, releasing energy.

It accounts for about 10% of electricity generation worldwide, according to the International Energy Association.

Many countries consider nuclear power critical to reaching their net-zero goals. But while nuclear reactors do not emit planet-warming greenhouse gases like gas- or coal-fired power plants, they produce radioactive waste that even advanced economies have struggled to dispose.

Why does Spain want to decommission its nuclear reactors? Spain generated nearly 57% of its electricity in 2024 from renewable energy sources like wind, hydropower and solar, according to Red Eléctrica, the country’s grid operator. About 20% came from nuclear power plants.

In 2019, Sánchez’s government approved a plan to decommission the country’s remaining nuclear reactors between 2027 and 2035 as it expands its share of renewable energy even further. The country aims to generate 81% of its electricity by 2030 from renewable sources.

Sánchez on Wednesday said that the four nuclear facilities that were online the day of the blackout did not help re-power the grid.

Batteries and other methods help regulate changes in electricity supply from wind and solar.

Why is Spain's renewables push being questioned now? While the cause of the sudden outage on April 28 is still unknown, the event has raised questions about the technical challenges facing electricity grids running on high levels of solar and wind.

Solar and wind provided roughly 70% of the electricity on the grid moments before Spain lost 15 gigawatts of electricity — about 60% of its supply — in just five seconds.

Electricity grids were designed for a different era, according to Gilles Thonet, deputy secretary general of the International Electrotechnical Commission, an industry group.

"Traditionally, power flowed in one direction: from large coal, gas or nuclear plants to homes and businesses," Thonet said. "These plants provided not only electricity, but also stability. Their spinning turbines acted like shock absorbers, smoothing out fluctuations in supply and demand."

In the days following the blackout, Google searches in Spain for "nuclear" spiked, according to data from Google Trends.

Spain’s nuclear lobby group Foro Nuclear said this week that the government should rethink its plan to decommission its nuclear reactors after the outage. Ignacio Araluce, its president, said the nuclear plants online before the outage "provide firmness and stability."

Would more nuclear power have prevented a blackout? Others say it is too soon to draw conclusions about what role nuclear energy should play.

"We do not know the cause of the oscillations," said Pedro Fresco, director general of Avaesen, an association of renewable energy and clean technology firms in Valencia. "Therefore, we do not know what would have allowed them to be controlled."

Spain’s grid operator last week narrowed down the source of the outage to two separate incidents in which substations in southwestern Spain failed.

Environment Minister Sara Aagesen said earlier this week that the grid had initially withstood another power generation outage in southern Spain 19 seconds before the blackout.

Sánchez in his speech to Parliament said there was "no empirical evidence" to show that more nuclear power on the grid could have prevented a blackout or allowed the country to get back online faster. In fact, the four nuclear facilities online on April 28 before the blackout were taken offline after the outage as part of emergency protocol to avoid overheating.

He said that nuclear energy "has not been shown to be an effective solution in situations like what we experienced on April 28," and called the debate surrounding his government's nuclear phase-out plan "a gigantic manipulation."

Gas and hydropower, as well as electricity transfers from Morocco and France, were used to get the country's grid back online.