La Pérouse Strait

from The American Heritage® Dictionary of the English Language, 5th Edition.

• A channel of the western Pacific Ocean between Sakhalin Island and northern Hokkaido, Japan, connecting the Sea of Okhotsk with the Sea of Japan.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun A strait dividing the Russian island of Sakhalin in the north from the Japanese island of Hokkaido, and connecting the Sea of Japan on the west with the Sea of Okhotsk on the east.