To whom do the Kalevala and its epic poems belong? Where are the origins of the epic poems? How do we understand the relationship between Finns and Karelians? Is the Finnish language closely related to the Karelian language? These questions were intensively discussed not only in Finland but also in the Soviet Union, and between Finland and the Soviet Union, in the 1940s and 1950s. This dissertation addresses repertories of Soviet imperial rule in Soviet Karelia, where the Karelo-Finnish Soviet Socialist Republic existed from 1940 to 1956, by scrutinizing the controversy over the Kalevala and pan-Finnik kinship among Soviet intellectuals in Soviet Karelia, Leningrad, and Moscow and between Soviet and Finnish intellectuals. The dissertation is based on varieties of archival materials from Russia, Finland, and Estonia to understand how the Soviet Union grafted pan-Finnic ideology/”heimoaate” onto the Soviet national ideology to justify its rule in Soviet Karelia and influence Finland to