In this study, I aim to apply the rhythmanalytic tradition in observation of modern East Asia, which specifically refers to territory lying within contemporary nation-states generally understood to belong to mainly China, Japan and Korea, while countries are not usually linked as static geographical points but rather as social constructs that change over time. Thus it may be possible to posit a region of East Asia in some periods, one of which dates during the early 20th century, when the countries of East Asia functioned and interacted as a region in concert in many ways including exercising the practices of modern civilization and its culture. In order to demonstrate my framework of rhythmanalysis, I will focus on the East Asian visual culture of the period, specifically on the emerging animation images in terms of three rhythmic elements such as fragmentation, repetition, and interruption. In the conclusion of this paper, I will challenge to discover how spacio-temporal meanings of the region have been constructed as mechanization, urbanization, and militarization in the modern East Asia.