Dr. Koji Otsuka
| Prefecture | Tokyo Metropolis |
| Belonging | Showa University Hospital https://www.showa-u.ac.jp/SUH/ |
| Specialized | digestive surgery |
| Experienced | thoracoscopic oesophageal surgery (including robotic surgery), endoscopic submucosal dissection (ESD) |
| Graduated University | Showa University |
