Okunoshima Island (Rabbit Island) | Hiroshima

Okunoshima is a small island located in the Seto Inland Sea, within the city of Hiroshima, Japan. It is primarily known for its large population of wild rabbits and its historical role as a former chemical weapons production site.

Visual Characteristics

The island's topography consists of rolling hills covered in dense vegetation, primarily trees and grasses. The coastline is characterized by rocky outcrops and small sandy coves. The surrounding sea is typically a muted blue-green, influenced by the brackish waters of the Seto Inland Sea. The island's highest point reaches approximately 110 meters above sea level.

Location & Access Logistics

Okunoshima is accessible via ferry from Tadanoumi Port on the mainland of Ōkunoshima Town, Hiroshima Prefecture. The ferry crossing takes approximately 15 minutes. Tadanoumi Port is reachable by train via the JR Kure Line to Tadanoumi Station, which is a 5-minute walk from the port. Limited parking is available at Tadanoumi Port. There are no public transport options directly on the island; movement is primarily by foot or bicycle rental.

Historical & Ecological Origin

Historically, Okunoshima was developed in the early 20th century as a site for the production of poison gas by the Imperial Japanese Army during the period leading up to and during World War II. Following the war, the island was decontaminated and later became a public park. Ecologically, the island's rabbit population is believed to have originated from a group of eight rabbits released onto the island in 1971 for a school trip, which subsequently bred and established a significant population.

Key Highlights & Activities

Visitors can observe and interact with the island's wild rabbit population. Walking or cycling the island's perimeter path, which is approximately 4 kilometers long, is a primary activity. The island features several historical remnants from its wartime past, including the former poison gas factory ruins and a museum dedicated to the island's history. Swimming is possible in designated areas during warmer months.

Infrastructure & Amenities

Restrooms are available at the ferry terminal and near the museum. Shade is provided by the island's tree cover, particularly along the walking paths. Cell phone signal (4G) is generally available across the island. Food vendors and a restaurant are located near the ferry terminal and the museum.

Best Time to Visit

The best time of day for photography, particularly for capturing rabbits in natural light, is early morning or late afternoon. The most favorable months for visiting are from March to May and from September to November, offering mild temperatures and clear skies. High tide is not a significant factor for access or activities on Okunoshima.

Facts & Legends

A notable historical fact is that the island was deliberately erased from maps during the war to conceal its role in poison gas production. A local legend suggests that the rabbits are descendants of pets brought by soldiers stationed on the island, though the more documented origin is the 1971 school trip release.

Nearby Landmarks

• Tadanoumi Port (0.5km South)
• Ōkunoshima Town (1km South)
• Miyajima Island (15km West)
• Hiroshima Peace Memorial Park (30km West)