La Perouse Strait
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La Pérouse Strait (Japanese: Sōya Strait 宗谷海峡) 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. It is 40km (25 miles) long and 20 to 40m deep.
The strait is named for Jean-François de Galaup, comte de La Pérouse (Count of La Pérouse), who explored the channel in 1787.