The first Japan Scicom Forum in Tokyo on April 20, 2018 gathered nearly 120 attendees to discuss the growing need and demand for English-language science communication in Japan and Asia. Keynotes and workshops addressed both the philosophy and motivations for scicomm in Japan and also the best practices for international outreach. Global science communication has reached a critical mass in Japan but securing sustainable funding, integrating the community and retaining momentum present ongoing challenges. As an online community and (hopefully) a recurring event, Japan Scicom Forum will foster a network of science communicators, professionalize and legitimize the field and boost English-language science communication in a country where it is still nascent.