Volume 1, The Aborigines of Sakhalin, contains translations into English of the Polish, Russian and Japanese material on, for example, the history, folklore, economic life, shamanism, sexual life, medical anthropology, and the bear festival which has been published between 1898 and 1936, mainly in local journals which are hardly accessible today. English, French and German articles appear in the original language.

Volume 2, Materials for the Study of Ainu Language and Folklore, contains a reprint of the classic 1912 Cracow edition with an Ainu-English index with indication of frequency and occurrence, a reverse index, an English index, and a grammatical index.