What Is Hashima Island and Why Was It Abandoned?
Hashima Island is a tiny, densely packed ghost town sitting in the waters near Nagasaki, Japan. Once the site of a booming undersea coal mine operated by Mitsubishi, it was abruptly abandoned in April 1974 after the mine was exhausted and petroleum replaced coal as Japan's primary fuel source. Mitsubishi gave residents just three months' notice before the last boat departed, leaving behind a maze of crumbling concrete apartment blocks, rusted machinery, and empty streets — all of which remain visible today, even on Google Street View. What makes Hashima far more than just a photogenic ruin is the layered, often suppressed history buried beneath its concrete shell: a history of empire, war, exploitation, and a diplomatic dispute that is very much alive today.
Coal was discovered beneath the island's seabed in the 1800s, and Mitsubishi purchased the entire island to tap that resource. The mine grew rapidly alongside Japan's industrial revolution. In 1874, Japan extracted 208,000 tons of coal nationally. By 1919, that figure had exploded to 31 million tons. Hashima was a central engine in that transformation, reaching its peak output of 410,000 tons of coal in 1941 alone — the same year Japan entered World War II.
Why Is Hashima Island Called Battleship Island?
As the mine expanded, Mitsubishi used slag from the coal operation to artificially widen the island, reclaiming land from the sea. A thick concrete seawall was erected around the perimeter to protect the new flatlands from powerful waves and typhoons. Over time, this process gave Hashima a distinctive silhouette: a long, gray, armored shape rising from the water that looked unmistakably like a battleship. Locals began calling it Gunkanjima, which translates literally to "Battleship Island." The nickname stuck, and today it remains one of the most recognized names for the site worldwide.
The resemblance to a warship was more than cosmetic. By the 1930s, as real warships patrolled the surrounding seas and Japan deepened its military campaigns across Asia, Hashima was producing the coal that fueled those very ships — many of them also built by Mitsubishi. The island was not just a metaphorical battleship; it was a functioning cog in Japan's war machine.
Was Hashima Used for Forced Labor in World War II?
Yes — and this is the part of Hashima's history that Japan has worked hardest to obscure. As Japan's imperial expansion across Asia pulled Japanese and Korean men into military service, massive labor shortages opened up in the country's industrial sector. To fill that gap, men and boys from Korea were forcibly conscripted to work in mines and factories. Chinese prisoners of war were also subjected to forced labor at industrial sites across Japan, including Hashima.
One survivor, Suh Jung-woo, was taken from his village at just 14 years old. As his boat approached Hashima and he saw its towering concrete seawall, he described it not as protection from the sea, but as a prison wall designed to keep people in. He was packed into a small apartment unit with six or seven other forced laborers. Conditions underground were brutal: temperatures reaching 37 degrees Celsius, suffocating humidity, and tunnels so tight that workers had to crouch and crawl through their entire 12-hour shifts. Rockslides were a constant threat, and safety standards were virtually nonexistent.
Many of the hundreds of Korean and Chinese laborers who died on the island, according to survivor accounts, were cremated on the nearby island of Nakanoshima. The columns of black smoke that rose into the sky were visible from Hashima — a daily, haunting reminder of what awaited those who could not survive. Japan has denied the existence of a crematorium on that neighboring island, and the historical record remains disputed.
What Really Happened to Workers on Hashima Island?
For the Japanese workers and their families, Hashima was a cramped but functioning community. To maximize every square meter of rock, Mitsubishi shipped in food and fresh water from the mainland rather than dedicate any land to farming. That freed up space for housing towers, a school, a hospital, shops, a movie theater, and even a Pachinko parlor. By 1959, the island held 5,259 people, making it the most densely populated place in Japanese history at the time.
But for the forced laborers — largely Korean and Chinese men conscripted during wartime — the experience was categorically different. They did not live in the same facilities or enjoy the same amenities. They worked the most dangerous shifts, had little recourse for injury or illness, and had no freedom to leave. The concrete seawall that Japanese residents saw as protection, these workers experienced as confinement. The gap between these two realities is precisely why the island remains so controversial, and why survivor testimonies are so important to preserving an accurate historical record.
Why Did South Korea Oppose Hashima's UNESCO Status?
When Japan nominated Hashima as part of a broader UNESCO World Heritage Site application in 2009, South Korea, North Korea, and China all pushed back strongly. Their objection was straightforward: how could a site that served as a location for wartime forced labor be honored with global heritage status without a full, honest acknowledgment of that history?
After years of negotiations, a breakthrough came in 2015. Japan agreed to include information about the forced labor history at Hashima as part of the UNESCO designation — a condition South Korea required before withdrawing its opposition. With South Korea's support secured, Hashima was officially inscribed as a UNESCO World Heritage Site.
But almost immediately, the Japanese government walked back the promise. Officials released statements characterizing Korean and Chinese laborers as having been "legally drafted" — drawing a false equivalence with Japanese men conscripted into military service. Only in 2023, after sustained international criticism, did Japan take minimal steps toward additional context. At the Industrial Heritage Information Center in Tokyo, a small exhibit includes a QR code linking to a video of the 2015 UNESCO committee discussion — but the remarks in that video are in English only, with no Japanese subtitles. The message being sent — and to whom — is hard to miss.
Can You Actually Visit Hashima Island Today?
Yes. Since 2009, Hashima has been open to officially sanctioned tourist groups. A fortified walkway and new docking area were installed on the sturdier section of the island, and tour boats depart regularly from the Nagasaki area. Visitors can walk along designated paths and look out over the decaying apartment blocks, overgrown staircases, and rusted industrial infrastructure. You cannot freely roam the island — structural instability makes it too dangerous — but the view from the walkways is dramatic enough to have inspired the villain's lair in the James Bond film Skyfall.
Google Street View also covers the island, so even armchair explorers can drop a pin and wander the empty streets virtually. The site attracts dark tourism enthusiasts, history buffs, and photographers from around the world — and that growing visitor interest is precisely what makes the question of how Hashima is presented so consequential. What story tourists are told when they arrive matters enormously.
Who Owned Hashima Island and Who Ran the Mine?
Hashima was purchased and operated entirely by Mitsubishi, one of Japan's most powerful industrial conglomerates. Mitsubishi didn't just run the coal mine — the company also manufactured the warships that coal helped power, as well as aircraft and weapons used during World War II. The company's fingerprints are on nearly every chapter of Hashima's history, from its industrial peak to its use of forced labor.
Mitsubishi still technically owns the land today. After the mine closed in 1974, the company had no incentive to maintain the structures, and so the buildings were left to decay. When tourism opened in 2009, the infrastructure upgrades were handled by local government rather than Mitsubishi. The company's relationship to the forced labor history — and whether it owes any form of acknowledgment or reparation — remains a deeply uncomfortable and largely unresolved question in Japan.
Why Does Hashima Island Still Matter?
Hashima is a place where the grand sweep of history — empire, industrialization, war, defeat, recovery — is physically encoded into crumbling concrete. Walking its paths, or even viewing them through a screen, makes viscerally real what maps and timelines can flatten into abstraction. The people who lived and died on this island weren't abstractions. They were workers, families, survivors, and victims caught inside forces much larger than themselves.
The ongoing dispute over how Hashima is remembered is not just a diplomatic footnote. It reflects a broader struggle over historical accountability — one that resonates far beyond Japan and South Korea. When a nation controls the narrative around its own dark history, the wounds don't actually close. They just get quieter. Hashima is proof that some places refuse to stay silent.
