Originally Posted by Martin H
This is the original WUKO, now named WKF. That is accepted by IOC.
The WUKO was supposed to merge with the ITKF (Nishiyama's group) but all they did was to change their name and told the ITKF to join. That soured the relations. Subsequent to the the WKC sprang up and the groups you mentioned.
Now there are too many of them - the WKF regards them as dissident groups and forbades interaction with them as at one stage they were also vying (or still are) for Olympic recognition.