Ryoji Tokashiki graduated from Tokyo Medical University in 1990 and has been a professor at Tokyo Medical University since 2008. In 2010, he opened his own practice, “Shinjyuku Voice Clinic”, focusing on voice disorders. He performs over 200 voice surgeries for unilateral vocal fold paralysis (UVFP) and spasmodic dysphonia annually and has achieved good outcomes. He also performs over 500 office surgeries annually for vocal fold lesions, such as polyps, nodules, cysts, and injection laryngoplasty. His practice also treats many patients with functional voice disorders, including stuttering. He uses 3DCT to analyze three-dimensional movement in cases of immobile vocal fold, in which the actual movement cannot be determined by endoscopy because of the two-dimensional nature of the technique. He is currently interested in analyzing brain activity of functional dysphonia, spasmodic dysphonia and stuttering using functional MRI.