Qualla: La Perouse Strait

La Perouse Strait: Introduction

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Raita Futo from Tokyo, Japan, CC BY 2.0. Japan's territorial waters extend twelve nautical miles from its coastline everywhere in the country except here. In La Perouse Strait, the boundary shrinks to just three miles. The reason has never been officially confirmed, but it is widely understood: the narrower claim creates a corridor of international waters through which nuclear-armed United States Navy vessels can transit without technically entering Japanese territory, preserving Japan's constitutional prohibition on nuclear weapons while allowing its most powerful ally to move freely between the Sea of Japan and the Sea of Okhotsk. It is a legal fiction disguised as a line on a chart, and it defines the character of this 42-kilometer-wide passage between Russia and Japan.

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Image: Raita Futo from Tokyo, Japan | CC BY 2.0

La Perouse Strait: The Navigator's Strait

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Efim Petelin, Public domain. The strait takes its Western name from Jean-Francois de Galaup, comte de Laperouse, a French naval officer who explored it in 1787 during a round-the-world voyage commissioned by Louis XVI. The Japanese call it Soya Strait, after Cape Soya on Hokkaido's northern tip. At its narro...

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Image: Efim Petelin | Public domain

La Perouse Strait: When Whalers Passed Through

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Maarten, CC BY 2.0. For nearly half a century, La Perouse Strait served as a seasonal highway for the American whaling fleet. Between 1848 and 1892, whaleships transited the passage each spring and summer, moving from right whale hunting grounds in the Sea of Japan to the Sea of Okhotsk in pursuit o...

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Image: Maarten | CC BY 2.0

La Perouse Strait: Where Wahoo Rests

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Max Shestera, CC BY-SA 3.0. On October 11, 1943, the American submarine USS Wahoo attempted to exit the Sea of Japan through La Perouse Strait after a devastating patrol in which she had sunk four ships totaling roughly 15,000 tons, including the Konron Maru with the loss of 544 lives. Japanese antisubmarin...

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Image: Max Shestera | CC BY-SA 3.0

La Perouse Strait: The Cold War Chokepoint

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit RA-96013, CC BY-SA 4.0. During the Cold War, La Perouse Strait became one of the most watched waterways on Earth. Soviet naval vessels transiting between Vladivostok and the Pacific had to pass through here or through other narrow straits in the Kuril Islands chain, all of them monitored by Japanese and...

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Image: RA-96013 | CC BY-SA 4.0

La Perouse Strait: A Bridge or a Tunnel

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Peutro, CC BY-SA 4.0. Plans have been proposed, shelved, and revived to physically connect the two sides of La Perouse Strait. The most ambitious is the Sakhalin-Hokkaido Tunnel, which would run beneath the seabed and link Japan's rail network to the Trans-Siberian Railroad, making it theoretically po...

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Image: Peutro | CC BY-SA 4.0