As internationalization in the learning environment is still developing in Japan, there is a need for further practical research in foreign language education which embeds international cooperative learning. The study reported in this paper aimed to explore the effectiveness of Intercultural Cooperative Project-Based Learning (IC-PBL) based on the integration of foreign language education and tourism education, aiming to develop the necessary skills for collaborating with people from diverse cultural and linguistic backgrounds. Working in the context of a Japanese university, we designed IC-PBL to incorporate the acquisition of knowledge of tourism, tour guide conversation training, field investigation of tourist destinations, and presentation of travel itineraries. Learning outcomes were evaluated based on the concept of "Fundamental Competencies for Working Persons" (Ministry of Economy, Trade and Industry, 2017) utilizing both quantitative and qualitative analysis. The study shows that the competencies for "independence," "ability to reach out to others," "creativity," and "ability to cope with stress" were enhanced through the IC-PBL practice. In addition, learners recognized that collaborative learning experiences supported their improvements in "thinking" and "teamwork" within the framework of the Fundamental Competencies for Working Persons. This IC-PBL model shows potential as an effective instructional design to integrate foreign language education and tourism education and promote the ability to work with diverse people towards a common goal.