This presentation looks at the use of Collaborative Online International Learning (COIL) from the perspective of Japanese students. Students from Japan, Spain, and Türkiye worked together on three major outputs connected to Sustainable Development Goals. The teachers designed the COIL elements based on the Pedagogy of Multiliteracies. Students worked in groups of five to seven and collaborated using video calls and text messages over the course of nine weeks. Students completed a pre- and post-intervention survey that focused on perceived communication competence, foreign language anxiety, and soft skills. The final survey included open-ended questions. Students completed three reflections throughout the COIL to share their thoughts on the group dynamic and their use of soft skills throughout the project. Based on the surveys and reflections, it appears that the COIL project had a positive effect on students perceived communication competence, foreign language anxiety, and on the development of soft skills.