Dr. Hiroki Hori is Professor at Graduate School of Medicine, Mie University in Tsu, Japan and a member of Japanese Society of Pediatric Hematology and Oncology (the former chair of the international committee). He has been working for Japan Children’s Cancer Group, the first nationwide study group for childhood cancer in Japan launched in 2014. He is a physician with more than 30 years’ experiences of the practice and human resource development in the field of pediatric hematology/oncology, social care for children with cancer and their families, and translational research in pharmacology. He has also joined international medical cooperation with resource-limited countries in Africa as an expert of Japan International Co-operation Agency and has a strong will to contribute to the WHO Global Initiative for Childhood Cancer as a member of SIOP.