Dr. Hiroyuki Okada
| Prefecture | Hyogo Prefecture |
| Belonging | Japanese Red Cross Society Himeji Hospital https://www.himeji.jrc.or.jp/category/diagnosis/naika/index.html |
| Specialized | gastroenterology |
| Experienced | gastroenterology (gastrointestinal tract), endoscopic therapy |
| Graduated University | Okayama University |
