check this link , has a lot of info on lodging .
As posted before , Hombu Dojo`s office is responsible only for "dojo related stuff " ( for lack of a better word) .You will have to find your way on every other matter by yourself
Given that this is one of those questions that must arise often it would probably make sense for them (and take less time than having to compose a reply) to have the information already available.
Maybe even on that wonderful thing called "the internet".
Really, I think that they could update the way that they do a lot of things - but that's not just a hombu problem, it's a problem with Japanese companies in general. Where else in the world are fax machines still standard?