This thesis describes and analyzes the appropriation of elements of Japanese media culture by a cultural movement of Brazilian young people. Its goal has been to examine the practices of youth who call themselves otakus and meet in anime conventions (meetings organized by manga and anime devotees). The participants in these meetings – thousands of young people and children from all over Brazil – practice activities through which they collectively develop specific forms of appropriation of those foreign cultural productions. Following the principles of ethnographically-orientated qualitative research, we investigated anime conventions that took place in 2006 and 2007 in four Brazilian regions. In addition to field word, we carried out structured interviews with 45 young participants in the events. Focus of the observations were the socialization processes at work, the shared ways of assimilating knowledge specifically related to Japanese pop culture, as well as the internal organization of the meetings and their rituals. Theoretical and methodological references were taken from authors active in the Latin-American Cultural Studies area, such as Renato Ortiz, Nestor García Canclini and Jesús Martin-Barbero.