Professor Takashi Toyonaga graduated from Ehime University School of Medicine in 1989. He has joined Kishiwada Tokushukai Hospital,Osaka, Japan and finished his residency over many courses and started his wide-spectrum training in Gastroenterology and Endoscopy.
In 2002, he has started to wrestle in ESD which was just newly developed. He invented the first water-jet emitting endo-knife: Flush knife in 2005 and resected more than 3000 cases in ten years with good results. In 2007, He was promoted as the Director, and Associate Professor of the Department of Endoscopy, Kobe University Hospital. He published many scientific papers regarding ESD. He also works energetically to spread ESD in all over the world and challenge to the limits of therapeutic endoscopy.