Dr. Sano (FJGES) is one of world leaders in the field of diagnostic and therapeutic colonoscopy. He showed many lectures regarding image enhanced endoscopy (IEE) technique and demonstrated endoscopy live with EMR/ESD technique at several countries. He skillfully uses magnifying colonoscopy with advanced imaging technique. He is a member of several advisory boards including Gastroenterological Endoscopy (JGES,JGA, Japan), Gastrointestinal Endoscopy (GIE, USA).