Oshima Peninsula

Oshima Peninsula is a peninsula in southwestern Hokkaido, Japan, between the Sea of Japan and the Pacific Ocean. It includes Hakodate and the volcanic landscapes around Mount Komagatake.

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Hokkaido: Hokkaido is Japan’s northernmost main island and its largest prefecture. Oshima Peninsula forms Hokkaido’s southwestern extension.
Hakodate: Hakodate is a port city in southern Hokkaido, Japan. It is the peninsula’s largest city and a major gateway to southern Hokkaido.
Ezo: Ezo was the historical Japanese name for Hokkaido and nearby northern regions. The peninsula’s history was shaped by its position on the former northern frontier called Ezo.
Matsumae: Matsumae is a town on the southwestern tip of Hokkaido, Japan. It marks the peninsula’s southwestern end and preserves a distinct early-modern history.
Sea of Japan: The Sea of Japan is a marginal sea of the northwest Pacific Ocean, bounded by Japan, Korea, and Russia. Its waters form the peninsula’s western coast.
Shinkansen: Shinkansen is Japan’s network of high-speed railway lines and trains. The Hokkaido Shinkansen reaches the peninsula through an undersea tunnel.
Ainu: The Ainu are an Indigenous people of northern Japan and adjacent regions of Russia. Ainu communities inhabited Hokkaido before and alongside Japanese expansion into the peninsula.
Esashi, Hokkaido: Esashi is a coastal town in southwestern Hokkaido, Japan. Its Sea of Japan port preserves the peninsula’s maritime heritage.
Pacific Ocean: The Pacific Ocean is the largest and deepest ocean on Earth. The peninsula’s eastern and southern shores face the Pacific.
Seikan Tunnel: The Seikan Tunnel is a railway tunnel beneath the Tsugaru Strait between Hokkaido and Honshu. It provides the peninsula’s fixed rail connection to Honshu.