The Silent Guardian of the Seto Inland Sea: Northern Battery Ruins of Okunoshima

The Island’s Secret Where Beautiful Scenery and History Intersect

Okunoshima floating in the Seto Inland Sea. The battery ruins standing on its northern part quietly tell the history of Japan's modernization and war, contrasting the peaceful sea scene.

A Place Where Peaceful Present and Turbulent Past Intersect

This battery, which once guarded the waterways of the Seto Inland Sea, is an important chapter in the island's history. Brick walls, stone fences, and concrete structures convey the tension of those times to the present.

Enigmatic Ruins That Spark the Spirit of Exploration

• A mysterious tunnel slightly off the outer perimeter path
• Battery remains hidden deep in the tunnel
• Scenic points overlooking the sea

These ruins stimulate the curiosity of visitors and expand their imagination of history.

A Special Place Telling the Tale of the Island’s Transformation

Okunoshima later became known as the “Poison Gas Island,