This study divides the cross-cultural adaptation process into cognitive cultural adaptation—defined as the reduction of uncertainty about the host country's culture—and affective cultural adaptation—defined as satisfaction with residing in the host society—and examines the influence of expatriates' cross-cultural adaptation process on their organizational commitment to the firm. Based on uncertainty reduction theory, this study argues that the acquisition of cultural knowledge through learning reduces uncertainty about the host culture, that reduced uncertainty increases satisfaction with the sojourn, and that this in turn contributes to enhanced organizational commitment to the firm. The research findings indicate that uncertainty about the host country's culture decreased with greater opportunities for pre-departure cultural training, longer duration of stay in the host country, greater use of local mass media, and more social interaction with local people. As uncertainty about the host country's culture decreased, satisfaction with residing in the host country increased. Furthermore, sojourn satisfaction was found to have a positive effect on organizational commitment to the firm in terms of reducing the intention to leave for another employer.