Dr. Ujiie is currently an associate professor of thoracic surgery at the Hokkaido University Hospital in Hokkaido, Japan. In 2004, he received his medical degree from Yamagata University and completed his thoracic surgery fellowship at the National Cancer Center Hospital Japan. In 2015, he finished a research fellowship at the thoracic oncology laboratory at Memorial Sloan-Kettering Cancer Center, New York, USA, and received his PhD from Chiba University Graduate School of Medicine, Japan. Since his research fellowship at MSKCC, he has been a post-doctoral research fellow at the University Health Network (UHN) and completed a thoracic surgery clinical fellowship at the Toronto General Hospital, University of Toronto, Canada. He has also worked as a guided therapeutics fellow, developing a minimally invasive therapy for thoracic malignancy. He has also been a clinical fellow of thoracic surgery. During this time, he trained in lung transplant surgery in the Toronto Lung Transplant Program. After his fellowship in North America, he joined Hokkaido University in 2019. Dr. Ujiie’s clinical focus is on minimally invasive thoracic surgery, such as video-assisted thoracic surgery (VATS) and robot-assisted thoracic surgery (RATS). He is focused on uniportal VATS and RATS currently.