In this study, we examined anxiety and learning in four students in the nursing science department of University who participated in overseas training at two national and private hospitals in Vietnam, using interviews before and after the training. We also performed an analysis based on observation of the students by a escorting teacher of the department. Nursing science education in Japan includes learning about the roles of nurses internationally and in various cultures (Ministry of Health, Labor, and Welfare, 2018). In the curriculum, this is described as international nursing science. University A provides overseas training during the sophomore year as part of its international education in nursing science. This allows students to gain nursing care experience at an early stage, develop international understanding, and learn language communications. Second-year students learning nursing science for the first time expressed clear anxiety about physiological and safety needs among the 5 categories of the Maslow Hierarchy of Needs (1968), but those who completed the training at hospitals in Vietnam also gained a high level of consciousness regarding issues such as family ties. Observation by a teacher of anxiety about language suggested that the students voluntarily thought about and developed non-verbal communications. The post-training interview indicated that the students had observed differences in medical facilities and the life and culture of patients at the hospitals in Vietnam, compared to the situation in Japan. This experience gave the students a good opportunity to consider the differences in medical services between Japan and developing countries.