This study adapted web-based exploratory tasks using WebQuests as a means of enabling students to understand and reflect on both the target and their own culture. Learners actively used various authentic resources selected to meet their linguistic and cognitive needs to complete the tasks. The aim of this study was to help Japanese university students in a homogeneous cultural environment enrolled in an intercultural communication class to understand various cultural contexts through a systematic inquiry-based approach using WebQuests, with the goal of eventually improving their intercultural competence. Quantitative data were collected through pre- and post-surveys and an adapted version of the Generalised Ethnocentrism-scale questionnaires, whereas qualitative data included analyses of students' reflection in weekly online forums and a final essay. The results of the study showed students' reduction in ethnocentricity and suggested students had acquired a deeper understanding of both their own culture and other cultures.