This thesis analyzes the unique visual expressions that were shown in four movies (“The other HIROSHIMA Korean A-bomb Victims Tell Their Story” (1986), “Song of Ariran - voices from Okinawa” (1991), “Nuchigafu - Life is a Treasure” (2012), “The Silence” (2017)) directed by Park Soo-nam, who is Zainich (Koreans in Japan) documentary director and continually raises questions regarding Japan's responsibility for the war. There have been many studies regarding Japanese documentaries addressing issues surrounding South / North Korean and Zainichi. However, most of them have reviewed representations in the wake of the changing times and circumstances or remained to compare the differences in representation methods and the audience's acceptance aspects of the producers. Likewise, in the studies of films regarding Zainichi, many centers on the representation of zainichi as an ethnic minority, while there's not enough analysis of visual expressions reflecting directors' thoughts or aesthetics about the film themes. In this study, I tried to analyze how Park Soo-nam, a Zainich documentary director, expressed Korean's war memories in her movies, focusing on the visual expressions in her four documentary films. In result, it is indicated that her movies reported and relayed Korean's war memories in several ways - utilizing the historical basis for testimonies and ‘found footage’ that remind the audience of the hidden side of the history, depicting victims' sufferings through the extreme eye close-ups, inducing immersion though proper use of camera composition and intervening of the producer by linguistic expressions such as narration, interviewer or voiceover. With this analysis work, I intend to expand the possibility of interpreting Park Soo-nam's film as well as to present another direction for future research on Zainichi films.