The Tsugaru Strait links the Sea of Japan to the Pacific Ocean, flowing between Japan’s two major islands—Honshū to the south and Hokkaidō to the north. At its narrowest point, just 12 miles wide, green slopes rise on the Tsugaru Peninsula to the south and the coastal Matsumae to the north. Halfway through, a broad channel flows into Honshū to form Mutsu Bay. At the strait’s other narrow point, the small town of Ōma rests on the northernmost tip of Honshū; opposite, Hokkaidō’s Hakodate, with its namesake mountain watching over, is one of Japan’s most modern cities.
