For all English speaking service:
| International Department | TEL: (+81)3-3818-4172 e-mail: intl@kodokan.org |
Japanese Speaking Service (Except International Dept.):
| Education & Instruction Dept. | TEL: 03-3818-4171, FAX: 03-3818-5828 |
| General Affairs Dept. | TEL: 03-3811-7152, FAX: 03-3811-7151 |
| International Dept. | TEL: 03-3818-4172 e-mail: intl@kodokan.org |
| Accounting Dept. | TEL: 03-3818-4179 |
| Grading Dept. | TEL: 03-3811-7153, FAX: 03-3811-8813 *For inquiries on your enrollment date or promotion date |
| Museum & Library | TEL: 03-3818-4562, FAX: 03-3818-4565 |
| Kodokan Osaka International Judo Center | TEL: 06-6961-0640 e-mail: osaka-soumu@kodokan.org Link to Kodokan Osaka International Judo Center |