Dr. Koki Otsuka
| Area | Iwate Prefecture |
| Medical institution affiliation | Iwate Medical University Hospital https://www.hosp.iwate-med.ac.jp/doctors/otsuka-kouki/ |
| Medical specialties | digestive surgery |
| Medical expertise | gastrointestinal surgery, colorectal surgery, colonoscopy |
| Graduated University | Iwate Medical University |
