| japan | | onchocerca dewittei japonica | subspecies | 1 | 0 |
| japan | chiba prefecture | onchocerca dewittei japonica | subspecies | 1 | 0 |
| japan | fukuoka prefecture | onchocerca dewittei japonica | subspecies | 1 | 1 |
| japan | fukushima prefecture | onchocerca dewittei japonica | subspecies | 1 | 0 |
| japan | hiroshima prefecture | onchocerca dewittei japonica | subspecies | 3 | 3 |
| japan | kagoshima prefecture | onchocerca dewittei japonica | subspecies | 1 | 0 |
| japan | oita prefecture | onchocerca dewittei japonica | subspecies | 13 | 8 |
| japan | shiga prefecture | onchocerca dewittei japonica | subspecies | 1 | 1 |
| japan | shimane prefecture | onchocerca dewittei japonica | subspecies | 1 | 1 |