I`d assume that there would be some kind of association for that, like I know they have the JSA for Skateboarding, heh but who knows, if lady-luck has her way with you then you could potentially be the next Bob Sap and become famous from your image alone.
Yes, you will. I worked out in a gym in Kyoto where the owner was a compeditor. He complained that he was never given a fair judging, (which I think he was onto something). He came like second twicetimes and 3rd twice. - but you will be able to compete.