The World Health Organization (WHO) Radiation Emergency Medical Preparedness and Assistance Network (REMPAN) convened a two-day seminar at Würzburg University, a REMPAN Collaborating Center, June 16-17, 2016. Fukushima Medical University, a REMPAN Liaison Institution, sent Dr. Shinichi Suzuki and Dr. Atsushi Kumagai to Würzburg as delegates and speakers. Würzburg University has been especially involved in thyroid cancer treatment following the nuclear accident in Chernobyl. As the seminar’s secretariat, Würzburg University was an outstanding venue for information sharing about health effects attributed to Chernobyl and Fukushima. FMU’s Dr. Suzuki presented the latest thyroid ultrasound screening results of children and adolescents in Fukushima. Dr. Kumagai reported 5 years of comprehensive health management for Fukushima residents of all ages, the current status of radiation risk perception, and various challenges residents face. Other speakers from Russia, Ukraine, Belarus, Japan, France, Germany, Switzerland and the United States provided deep insights into post-Chernobyl and post-Fukushima disaster remediation, along with broadly applicable epidemiological theory and risk-mediation measures.