Gunkanjima, officially Hashima, is a small abandoned island off Nagasaki whose silhouette of dense high-rise ruins resembles a battleship — hence its nickname. From the 1880s it was a coal-mining island, and to house the thousands of miners and their families, some of Japan’s first large reinforced-concrete apartment blocks were packed onto its tiny surface, making it at its peak in the 1950s the most densely populated place on Earth. When the mine closed in 1974 everyone left almost overnight, and the island was frozen in time — a ghostly maze of decaying buildings, empty stairwells and shattered windows slowly reclaimed by the sea and weather. Now a UNESCO World Heritage site (as part of Japan’s Meiji industrial revolution sites), it can be visited on guided sightseeing boat tours that land on a walkway and view the eerie ruins. Atmospheric and unforgettable.
🗓️ At a Glance
| Location | Off Nagasaki port |
| Hours | Boat tours daytime |
| Admission | Paid boat tour |
| Time needed | Half day (with cruise) |
| Best time | Calm weather; tours may cancel |
What to See
- The battleship silhouette of dense ruins from the sea.
- Crumbling early reinforced-concrete apartment blocks.
- A ghost island frozen since the mine closed in 1974.
- A UNESCO World Heritage industrial site.
Combine Your Visit
- Combine with the Nagasaki harbour night view .
- Pair with Dejima in the city.
- Read our Nagasaki overview .
Getting There
- By boat: guided landing tours from Nagasaki port.
- By cruise: some tours circle the island without landing.
Tips
Book a landing tour in advance and be aware that boats and landings are frequently cancelled in rough weather or high seas, so allow flexibility in your schedule. Wear sturdy shoes for the walkway, follow the guide as access is restricted to a set path for safety, and combine the cruise with Nagasaki’s harbour and history sights.
