Dr. Koji Otsuka
| Area | Tokyo Metropolis |
| Medical institution affiliation | Showa University Hospital https://www.showa-u.ac.jp/SUH/ |
| Medical specialties | digestive surgery |
| Medical expertise | thoracoscopic oesophageal surgery (including robotic surgery), endoscopic submucosal dissection (ESD) |
| Graduated University | Showa University |
