Thanks to his position, Piłsudski enjoys slightly more freedom than the other exiles: he lives in a cottage and runs botanical research. After two years of his stay at the island he meets a Russian exile, the anthropologist Lev Sternberg, who persuades him to write a ‘Sakhalin journal’. From that moment on, Bronisław writes down fables, legends and rituals of the local peoples.
In the southern part of the island he meets the Ainu people. Because of their appearance, they are scathingly called the ‘shaggy people’ by the Japanese and the Russians. Bronisław, however, treats them with respect: he learns the Ainu language, builds schools, and supports the community.
On behalf of the Ainu he negotiates with local authorities. When the Russian forbid fishing, Piłsudski advises the Ainu how to survive. He convinces them to plant potatoes, cultivate fields and amass salted food supplies.
After ten years of exile, Piłsudski decides not to take advantage of his right to amnesty, instead deciding on staying among the Ainu and Nivkh peoples. To him it is ‘the only community on the entire island which is not morally degenerate’.
In 1899 Piłsudski is transferred to Vladivostok. He becomes a curator in a museum and the secretary of a branch of the Russian Geographical Society. He prepares the Far East part of the Russian exhibition for the world exposition in 1900. The Imperial Saint Petersburg Academy of Sciences appreciates his research on the Sakhalin peoples and instructs him to do more work in the field.
Piłsudski creates a dictionary containing 10,000 words of the Ainu language, as well as two more lexicons containing 6,000 words of Nivkh and 2,000 of Orok respectively. He also makes film and photographic documentation. Around 1903, Piłsudski marries an Ainu woman, a relative of a chief.