The purpose of this study was to explore how cross-cultural competencies relates to the level of foreign language conversation capability in cross-cultural organizations. Using a sample of 38 administrative employees working for an international graduate school in Japan, we analyzed two types of cross-cultural competencies in cross-cultural work settings: goal management and adaptability. We developed a scale for each competency and applied exploratory factor analysis and confirmatory factor analysis to verify discriminant and convergent validity. Cronbach’s alphas of the two competencies were acceptable. Regression analysis revealed that foreign language conversation capability significantly affected goal management and adaptability after controlling for individual demographic characteristics of gender, age, and length of overseas stay. In conclusion, foreign language conversation capability as a communicative tool in global organizations strongly relates to the cross-cultural competencies of goal management and adaptability. This study suggested that it is important for those who work in cross-cultural contexts to enhance foreign language conversation capability with regard to the development of cross-cultural competencies. Finally, we discussed implications based on the results of this study.