Regarding the traditional physical activities undertaken by Taiwan indigenous people, few researchers have emphasized on the influence of gymnastic education and baseball on Taiwan aborigines in the Japanese Colonial Era. Traditionally, the physical activities undertaken by Taiwan indigenous people were mostly integrated with rituals; there were no courses on physical activities such as gymnastics or baseball. The focus of their education lies on political and military aspects. For physical activities, they emphasized on the trainings of life and survival skills. The contents of their education lack systemic organizing or planning units, neither did they provide educational sites for implementing the contents and goals of those courses. After the primary school education in the Japanese Colonial Era, Taiwan aborigines begun to be engaged in gymnastic education and baseball inforced by the stipulations of national systems and policies. Meanwhile, Japanese could fulfill the intention to assimilate Taiwan indigenous people. For Taiwan aborigines, the content of indigenous physical activities had been changed after contacting with gymnastic education and baseball. Furthermore, these sports have become professional and leisure-oriented. Taiwan aborigines have embraced the new thinking that baseball can be an occupational choice for their future career. Therefore, when exploring the gymnastic education in the Japanese Colonial Era, we analyzed the evolutionary processes of baseball related to Taiwan aborigines, so as to understand the correlation between the implementation of gymnastic education and baseball and the traditional physical activities. Also, the causal analyses had been undertaken to analyze the influence of the achievements made by NO KO and KA NO Baseball Teams on subsequent baseball activities undertaken by Taiwan aborigines.