I'm trying to get a better idea of the different Shotokan organizations that exist today (the major ones). Although I earned my first few kyu grades in a JKA Shotokan school, I did most of my karate training at an independent dojo that taught Shotokan blended with other arts. We never spent much time talking about other Shotokan schools, so I don't really have a clear picture of how different they are.
I realize that there are probably thousands of dojos that teach some variation of Shotokan, but I'm only talking about large organizations. I've heard of JKA, ISKF, KWF, SKA, and HDKI. And of course, I've seen a long list of different organizations on Wikipedia. If someone has time, could you give me just a brief overview of the major differences between the most well-known organizations (if any)? Do they all do one-step/two-step/three-step sparring? Are the kata significantly different?
For example, I recently watched some videos of kata performed by Honda Sensei, a graduate of Waseda University. His Shotokan looks a bit different than what I'm used to:
I realize that there's probably a lot of politics between the organizations. Let's avoid that . . . I don't want to start a debate. I'm just trying to learn about the major differences in the way they practice.
Thanks in advance.