Guide
The Okunoshima Poison Gas Museum is a significant historical site located in the eastern area of Takehara City, Hiroshima Prefecture. During World War II, Okunoshima was the site of secret, large-scale chemical weapons production. To conceal this activity, the island was omitted from official military maps, earning it the chilling nickname, "The Island Erased from Maps." Today, the site has been preserved as a place of reflection, where the ruins of artillery positions and storage facilities sit quietly amidst a peaceful, natural landscape, serving as a testament to the enduring hope for world peace.
Historically, Okunoshima served as a specialized military base for the production of chemical weapons. The unique and dark history of being intentionally removed from maps to hide its existence adds a profound layer to the visitor experience. In 1988, the current Okunoshima Poison Gas Museum was established to preserve the memory of this era and to promote a culture of permanent peace. Visitors can experience the striking contrast between the island's former military role and its current status as a tranquil vacation destination.
Inside the museum, visitors can view detailed exhibits related to the history of chemical weapons production. The surrounding island landscape is dotted with physical remnants of the past, including artillery-site ruins, chemical storage facilities, and the remains of a wartime power plant. These structures provide a tangible and sobering connection to the scale of military operations that once occurred here, helping visitors grasp the gravity of the history that was once hidden from the world.
The museum is generally open during daylight hours. Because the entire island is enveloped in lush, beautiful nature, the scenery changes with the seasons. We recommend visiting during the bright hours of the day; the sunlight makes it much easier to observe the shapes and details of the ruins and the surrounding landscape, which is essential for fully understanding the historical context.
Beyond the museum exhibits, Okunoshima offers various ways to enjoy the outdoors. You can explore the island via cycling or simply enjoy the natural scenery. Visiting the historical ruins and then transitioning to the peaceful, natural environment of the island provides a unique experience of the contrast between a turbulent past and a peaceful present.
On the island, you will find facilities such as Kyukamura Okunoshima and Seto Onsen for accommodation and relaxation. The area also features natural spots like the Okunoshima Beach and Mt. Kurotaki. A common itinerary involves a deep dive into history at the museum followed by leisure and nature exploration around the island.
Visiting the museum requires preparation for island travel. Since you must take a boat to reach the island, please confirm the ferry schedules in advance. Within the museum and the historical sites, a quiet and respectful atmosphere is required to honor the history of the location. When using local facilities or exploring the island, please follow all local rules and guidelines. For the best experience exploring the ruins, comfortable walking shoes are highly recommended.