According to Alexei Nakamura, as of 2012, there are only 205 Ainu living in Russia (up from just 12 people who self-identified as Ainu in 2008) and they, along with the Kurile Kamchadals (Itelmen of Kuril Islands), are fighting for official recognition.
Waldemar Bogoras's grammar of Chukchi, Koryak and Itelmen (misleadingly titled just Chukchee) was delayed by the onset of the First World War and Russian Revolution.
Their subsistence by fishing and coastal sea-mammal hunting is very similar to the Koryak and Itelmen on the Kamchatka Peninsula.