Okhotsk culture
The Okhotsk culture is an archaeological coastal fishing and hunter-gatherer culture that developed around the southern coastal regions of the Sea of Okhotsk, including Sakhalin, northeastern Hokkaido, and the Kuril Islands, during the last half of the first millennium to the early part of the second. The Okhotsk are often associated to be the ancestors of the Nivkh people, while others argue them to be identified with early Ainu speakers.