Japan’s Top 7 Abandoned Ruins Sites – The Ultra-Popular Battleship Island Makes the List Again

By MOOK Scenic Spots Editorial Department, compiled and reported
 
In recent years, an alternative trend of ruin tourism has emerged, captivating anime fans, ruin enthusiasts, and even wedding photographers. Whether it’s remote uninhabited islands, abandoned amusement parks, or even former mining sites, the strong postmodern vibe means that every snapshot captures something stunning. These forgotten ruins, shrouded in mystery, have become one of the latest hotspots for travel selfies.

1. Battleship Island (Gunkanjima)

Battleship Island began coal mining development in 1890 and became a key pillar of Japan’s modernization as part of the Hashima coal mining operations. Though small in size, the island was home to nearly 5,000 residents at its peak. After it was closed in 1974, Battleship Island became uninhabited, but many of the facilities built for residents—such as the hospital, school, shrine, and cinema—remain intact. In 2015, it was inscribed as a UNESCO World Heritage Site, drawing global attention once again.

2. Tomogashima (Friendship Islands)

Tomogashima (Tomogashima) is an uninhabited island floating in the Kii Channel off Wakayama. It retains remnants from the war period, such as artillery batteries, and its red-brick buildings are now overgrown with vegetation, creating dreamlike scenery reminiscent of a real-life “Castle in the Sky.” Loved not only by ruin fans but also by anime enthusiasts, it’s a highly talked-about destination. Except for some restricted areas, most of the island is open for exploration and can be reached by speedboat from Kada Port.

3. Sarushima (Monkey Island)

Sarushima is the only uninhabited island in Tokyo Bay. Once used by the navy as a fortress, it once housed artillery installations, but is now part of Sarushima Park with walking trails available for free exploration. The island still retains tunnels, barracks, and ammunition depots from its past, offering a glimpse into history and preserving memories of the era. It takes about 10 minutes by boat from Yokosuka’s Mikasa Bridge, or around one hour from Tokyo—making it a must-visit spot for those who enjoy light ruin-themed travel.

4. Kezo Numa Amusement Park

In 1979, a Sendai-based real estate company opened Kezo Numa Amusement Park to boost local tourism. However, due to the economic downturn from the bubble economy, visitor numbers declined, and the park was closed in 2001. The Ferris wheel and other rides were preserved after appeals, and park staff continue regular maintenance. Although entry is not allowed freely, guided tours are occasionally held for the public.