Dr. Koji Kawai
| Area | Chiba Prefecture |
| Medical institution affiliation | International University of Health and Welfare Narita Hospital https://naritahospital.iuhw.ac.jp/doctor/renal-urological-surgery.html |
| Medical specialties | urology |
| Medical expertise | urological cancers (especially testicular tumours), renal cancer, prostate cancer, cancer immunotherapy, chemotherapy, immunotherapy |
| Graduated University | University of Tsukuba |
