La Pérouse Strait

La Pérouse Strait, or Sōya Strait, is a strait dividing the southern part of the Russian island of Sakhalin from the northern part of the Japanese island of Hokkaidō, and connecting the Sea of Japan on the west with the Sea of Okhotsk on the east.

The strait is 42 km long and 40 to 140 m deep. The narrowest part of the strait is in the west between Russia's Cape Krillion and Japan's Cape Sōya, which is also the shallowest at only 60 metres deep. A small rocky island, appropriately named Kamen Opasnosti is located in the Russian waters in the northeastern part of the strait, 8 miles southeast of the Cape Krillion. Another small island, Bentenjima, lies near the Japanese shore of the strait.

Source: Wikipedia